Settings in WeeWX that might influence rain output values?

WeatherWatch

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Dec 2, 2025, 8:35:18 AM (4 days ago) Dec 2

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Hi,

Can anyone suggest if there are any settings in WeeWx that might influence the rain output values.

I have a Davis Vantage Pro2 with WeatherLink live, WeeWX (with fuzzy-archer / bootstrap) is running on a Ubuntu server and everything except rain seems to tally up between Weather link and WeeWX, WeeWX is also updating to Wunderground with the same rain error present.

So taking yesterday as an example WLL retorted 15.2mm of rain (which felt about right, very technical method!) yet WeeWX (and Wunderground) reported 939.8mm (obviously wrong as my feet are still dry).

Any advise for where to start looking would be great, I'm pretty computer literate, but totally new (1 week) to WeeWX.

Thanks in advance.

michael.k...@gmx.at

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Dec 2, 2025, 8:43:07 AM (4 days ago) Dec 2

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I'd check https://weewx.com/docs/5.2/reference/weewx-options/stdcalibrate/#corrections Section in weewx.conf first. Posting your weewx.conf might also be helpful. Make sure you don't include any credentials.

WeatherWatch

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Dec 2, 2025, 9:13:35 AM (4 days ago) Dec 2

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Thanks for the pointer but I can't see anything in the corrections that might cause this, but obviously there is something somewhere.

Config for info

# WEEWX CONFIGURATION FILE

#

# See the file LICENSE.txt for your rights.

##############################################################################

# This section is for general configuration information.

# Set to 1 for extra debug info, otherwise comment it out or set to zero.

debug = 1

# Whether to log successful operations. May get overridden below.

log_success = True

# Whether to log unsuccessful operations. May get overridden below.

log_failure = True

# This configuration file was created by ...

version = 5.2.0

##############################################################################

# This section is for information about the station.

[Station]

# Description of the station location, such as your town.

location = "xx"

# Latitude in decimal degrees. Negative for southern hemisphere.

latitude = xx

# Longitude in decimal degrees. Negative for western hemisphere.

longitude = -xx

# Altitude of the station, with the unit it is in. This is used only

# if the hardware cannot supply a value.

altitude = xx, meter # Choose 'foot' or 'meter' for unit

# Set to type of station hardware. There must be a corresponding stanza

# in this file, which includes a value for the 'driver' option.

station_type = WeatherLinkLive

# The start of the rain year (1=January; 10=October, etc.). This is

# downloaded from the station if the hardware supports it.

rain_year_start = 1

# Start of week (0=Monday, 6=Sunday)

week_start = 0

#------------------------------------------------------------------------------

# WeatherLink Live Driver Section (using the third-party extension)

#------------------------------------------------------------------------------

[WeatherLinkLive]

driver = user.weatherlinklive

host = xx

port = 80

poll_interval = 60

##############################################################################

[Simulator]

# This section is for the weewx weather station simulator.

# The time (in seconds) between LOOP packets.

loop_interval = 2.5

# The simulator mode can be either 'simulator' or 'generator'.

# Real-time simulator. Sleep between each LOOP packet.

mode = simulator

# Generator. Emit LOOP packets as fast as possible (useful for testing).

#mode = generator

# The start time. Format is YYYY-mm-ddTHH:MM. If not specified, the

# default is to use the present time.

#start = 2011-01-01T00:00

# The driver to use.

driver = weewx.drivers.simulator

##############################################################################

# This section is for uploading data to Internet sites

[StdRESTful]

# Uncomment and change to override logging for uploading services.

# log_success = True

# log_failure = True

[[StationRegistry]]

# To register this weather station at weewx.com, set this to true, and

# set option 'station_url', located in the [Station] section above.

register_this_station = True

[[AWEKAS]]

# This section is for configuring posts to AWEKAS.

# If you wish to post to AWEKAS, set the option 'enable' to true, then

# specify a username and password.

# Use quotes around the password to guard against parsing errors.

enable = false

username = replace_me

password = replace_me

[[CWOP]]

# This section is for configuring posts to CWOP.

# If you wish to post to CWOP, set the option 'enable' to true,

# then specify the station ID (e.g., CW1234).

enable = false

station = replace_me

# If this is an APRS (radio amateur) station, specify the

# passcode (e.g., 12345). Otherwise, ignore.

passcode = replace_me

[[PWSweather]]

# This section is for configuring posts to PWSweather.com.

# If you wish to post to PWSweather.com, set the option 'enable' to

# true, then specify a station and password.

# Use quotes around the password to guard against parsing errors.

enable = false

station = replace_me

password = replace_me

[[WOW]]

# This section is for configuring posts to WOW (wow.metoffice.gov.uk).

# If you wish to post to WOW, set the option 'enable' to true, then

# specify a station and password.

# Use quotes around the password to guard against parsing errors.

enable = false

station = replace_me

password = replace_me

[[WOW-BE]]

# This section is for configuring WeeWX to upload to WOW-BE (wow.meteo.be)

# If you wish to post to WOW-BE, set the option 'enable' to true, then

# specify a station and password.

# Use quotes around the password to guard against parsing errors.

enable = false

station = replace_me

password = replace_me

[[Wunderground]]

# This section is for configuring posts to the Weather Underground.

# If you wish to post to the Weather Underground, set the option

# 'enable' to true, then specify a station (e.g., 'KORHOODR3'). Use

# the station key (find it at

# https://www.wunderground.com/member/devices) for the password.

enable = true

station = xx

password = xx

log_success = True # Add this line

log_failure = True # Add this line

# Set the following to True to have weewx use the WU "Rapidfire"

# protocol. Not all hardware can support it. See the User's Guide.

rapidfire = true

##############################################################################

# This section specifies what reports, using which skins, to generate.

[StdReport]

# Where the skins reside, relative to WEEWX_ROOT

SKIN_ROOT = skins

# Where the generated reports should go, relative to WEEWX_ROOT

HTML_ROOT = /var/www/html/weewx

# Uncomment and change to override logging for reports.

# log_success = True

# log_failure = True

# The database binding indicates which data should be used in reports.

data_binding = wx_binding

# Each of the following subsections defines a report that will be run.

# See the customizing guide to change the units, plot types and line

# colors, modify the fonts, display additional sensor data, and other

# customizations. Many of those changes can be made here by overriding

# parameters, or by modifying templates within the skin itself.

[[SeasonsReport]]

# The SeasonsReport uses the 'Seasons' skin, which contains the

# images, templates and plots for the report.

skin = Seasons

enable = false

[[SmartphoneReport]]

# The SmartphoneReport uses the 'Smartphone' skin, and the images and

# files are placed in a dedicated subdirectory.

skin = Smartphone

enable = false

HTML_ROOT = /var/www/html/weewx/smartphone

[[MobileReport]]

# The MobileReport uses the 'Mobile' skin, and the images and files

# are placed in a dedicated subdirectory.

skin = Mobile

enable = false

HTML_ROOT = /var/www/html/weewx/mobile

[[StandardReport]]

# This is the old "Standard" skin. By default, it is not enabled.

skin = Standard

enable = false

[[Bootstrap]]

skin = Bootstrap

enable = true

lang = en

HTML_ROOT = /var/www/html/weewx/Bootstrap

[[[LiveGauges]]]

live_gauge_items = windDir, windSpeed, windGust, barometer, outTemp, outHumidity

[[[[outTemp]]]]

minvalue = -20

maxvalue = 40

splitnumber = 6

lineColor = '#428bca', '#b44242'

lineColorUntil = 0, 40

decimals = 1

[[[[barometer]]]]

minvalue = 940

maxvalue = 1050

splitnumber = 11

lineColor = '#428bca', '#b44242'

lineColorUntil = 1013.2, 1050

decimals = 1

[[FTP]]

# FTP'ing the results to a webserver is treated as just another report,

# albeit one with an unusual report generator!

skin = Ftp

# If you wish to use FTP, set "enable" to "true", then fill out the

# next four lines.

# Use quotes around the password to guard against parsing errors.

enable = True

user = xx

password = xx

server = ftpupload.net # The ftp server name, e.g, www.myserver.org

path = /htdocs # The destination directory, e.g., /weather

# Set to True for an FTP over TLS (FTPS) connection. Not all servers

# support this.

secure_ftp = false

# To upload files from something other than what HTML_ROOT is set

# to above, specify a different HTML_ROOT here.

#HTML_ROOT = /var/www/html/weewx

# Most FTP servers use port 21.

port = 21

# Set to 1 to use passive mode, zero for active mode

passive = 1

[[RSYNC]]

# rsync'ing to a webserver is treated as just another report.

skin = Rsync

# If you wish to use rsync, you must configure passwordless ssh using

# public/private key authentication from the user account that weewx

# runs to the user account on the remote machine where the files

# will be copied.

#

# If you wish to use rsync, set "enable" to "true", then

# fill out server, user, and path.

# The server should appear in your .ssh/config file.

# The user is the username used in the identity file.

# The path is the destination directory, such as /var/www/html/weather.

# Be sure that the user has write permissions on the destination!

enable = false

server = replace_me

user = replace_me

path = replace_me

# To upload files from something other than what HTML_ROOT is set

# to above, specify a different HTML_ROOT here.

#HTML_ROOT = /var/www/html/weewx

# Rsync can be configured to remove files from the remote server if

# they don't exist under HTML_ROOT locally. USE WITH CAUTION: if you

# make a mistake in the remote path, you could could unintentionally

# cause unrelated files to be deleted. Set to 1 to enable remote file

# deletion, zero to allow files to accumulate remotely.

delete = 0

# Options in the [[Defaults]] section below will apply to all reports.

# What follows are a few of the more popular options you may want to

# uncomment, then change.

[[Defaults]]

# Which language to use for all reports. Not all skins support all

# languages. You can override this for individual reports.

lang = en

# Which unit system to use for all reports. Choices are 'us', 'metric',

# or 'metricwx'. You can override this for individual reports.

unit_system = metric

[[[Units]]]

# Option "unit_system" above sets the general unit system, but

# overriding specific unit groups is possible. These are popular

# choices. Uncomment and set as appropriate. The unit is always

# in the singular, e.g., 'mile_per_hour', NOT 'miles_per_hour'

[[[[Groups]]]]

group_altitude = meter # Options are 'foot' or 'meter'

group_barometer = mbar # Options are 'inHg', 'mmHg', 'mbar', or 'hPa'

group_rain = mm # Options are 'inch', 'cm', or 'mm'

group_rainrate = mm_per_hour # Options are 'inch_per_hour', 'cm_per_hour', or 'mm_per_hour'

group_temperature = degree_C # Options are 'degree_C', 'degree_F', or 'degree_K'

group_speed = knot

group-speed2 = knot2

# The following line is used to keep the above lines indented

# properly. It can be ignored.

unused = unused

# Uncommenting the following section frequently results in more

# attractive formatting of times and dates, but may not work in

# your locale.

[[[[TimeFormats]]]]

# day = %H:%M

# week = %H:%M on %A

# month = %d-%b-%Y %H:%M

# year = %d-%b-%Y %H:%M

# rainyear = %d-%b-%Y %H:%M

# current = %d-%b-%Y %H:%M

# ephem_day = %H:%M

# ephem_year = %d-%b-%Y %H:%M

# The following line is used to keep the above lines indented

# properly. It can be ignored.

unused = unused

[[[Labels]]]

# Users frequently change the labels for these observation types.

[[[[Generic]]]]

# inHumidity = Inside Humidity

# inTemp = Inside Temperature

# outHumidity = Outside Humidity

# outTemp = Outside Temperature

# extraTemp1 = Temperature1

# extraTemp2 = Temperature2

# extraTemp3 = Temperature3

# The following line is used to keep the above lines indented

# properly. It can be ignored.

unused = unused

##############################################################################

# This service converts the unit system coming from the hardware to a unit

# system in the database.

[StdConvert]

# The target_unit affects only the unit system in the database. Once

# chosen it cannot be changed without converting the entire database.

# Modification of target_unit after starting weewx will result in

# corrupt data - the database will contain a mix of US and METRIC data.

#

# The value of target_unit does not affect the unit system for

# reporting - reports can display US, Metric, or any combination of units.

#

# In most cases, target_unit should be left as the default: US

#

# In particular, those migrating from a standard wview installation

# should use US since that is what the wview database contains.

# DO NOT MODIFY THIS VALUE UNLESS YOU KNOW WHAT YOU ARE DOING!

target_unit = US # Options are 'US', 'METRICWX', or 'METRIC'

##############################################################################

# This section can adjust data using calibration expressions.

[StdCalibrate]

[[Corrections]]

# For each type, an arbitrary calibration expression can be given.

# It should be in the units defined in the StdConvert section.

# Example:

#foo = foo + 0.2

##############################################################################

# This section is for quality control checks. If units are not specified,

# values must be in the units defined in the StdConvert section.

[StdQC]

[[MinMax]]

barometer = 26, 32.5, inHg

pressure = 24, 34.5, inHg

outTemp = -40, 120, degree_F

inTemp = 10, 120, degree_F

outHumidity = 0, 100

inHumidity = 0, 100

windSpeed = 0, 120, mile_per_hour

rain = 0, 10, inch

##############################################################################

# This section controls the origin of derived values.

[StdWXCalculate]

[[Calculations]]

# How to calculate derived quantities. Possible values are:

# hardware - use the value provided by hardware

# software - use the value calculated by weewx

# prefer_hardware - use value provide by hardware if available,

# otherwise use value calculated by weewx

pressure = prefer_hardware

altimeter = prefer_hardware

appTemp = prefer_hardware

barometer = prefer_hardware

cloudbase = prefer_hardware

dewpoint = prefer_hardware

ET = prefer_hardware

heatindex = prefer_hardware

humidex = prefer_hardware

inDewpoint = prefer_hardware

maxSolarRad = prefer_hardware

rainRate = prefer_hardware

windchill = prefer_hardware

windrun = prefer_hardware

##############################################################################

# For hardware that supports it, this section controls how often the

# onboard clock gets updated.

[StdTimeSynch]

# How often to check the weather station clock for drift (in seconds)

clock_check = 14400

# How much it can drift before we will correct it (in seconds)

max_drift = 5

##############################################################################

# This section is for configuring the archive service.

[StdArchive]

# If the station hardware supports data logging then the archive interval

# will be downloaded from the station. Otherwise, specify it (in seconds).

archive_interval = 300

# If possible, new archive records are downloaded from the station

# hardware. If the hardware does not support this, then new archive

# records will be generated in software.

# Set the following to "software" to force software record generation.

record_generation = hardware

# Whether to include LOOP data in hi/low statistics.

loop_hilo = True

# Uncomment and change to override logging for archive operations.

# log_success = True

# log_failure = True

# The data binding used to save archive records.

data_binding = wx_binding

##############################################################################

# This section binds a data store to a database.

[DataBindings]

[[wx_binding]]

# The database must match one of the sections in [Databases].

# This is likely to be the only option you would want to change.

database = archive_sqlite

# The name of the table within the database.

table_name = archive

# The manager handles aggregation of data for historical summaries.

manager = weewx.manager.DaySummaryManager

# The schema defines the structure of the database.

# It is *only* used when the database is created.

schema = weewx.schemas.wview_extended.schema

##############################################################################

# This section defines various databases.

[Databases]

# A SQLite database is simply a single file.

[[archive_sqlite]]

database_name = weewx.sdb

database_type = SQLite

# MySQL

[[archive_mysql]]

database_name = weewx

database_type = MySQL

##############################################################################

# This section defines defaults for the different types of databases.

[DatabaseTypes]

# Defaults for SQLite databases.

[[SQLite]]

driver = weedb.sqlite

# Directory in which database files are located, relative to WEEWX_ROOT

SQLITE_ROOT = /var/lib/weewx

# Defaults for MySQL databases.

[[MySQL]]

driver = weedb.mysql

# The host where the database is located.

host = localhost

# The user name for logging in to the host.

user = weewx

# Use quotes around the password to guard against parsing errors.

password = weewx

##############################################################################

# This section configures the internal weewx engine.

[Engine]

# This section specifies which services should be run and in what order.

[[Services]]

prep_services = weewx.engine.StdTimeSynch

data_services = ,

process_services = weewx.engine.StdConvert, weewx.engine.StdCalibrate, weewx.engine.StdQC, weewx.wxservices.StdWXCalculate

xtype_services = weewx.wxxtypes.StdWXXTypes, weewx.wxxtypes.StdPressureCooker, weewx.wxxtypes.StdRainRater, weewx.wxxtypes.StdDelta

archive_services = weewx.engine.StdArchive

restful_services = weewx.restx.StdStationRegistry, weewx.restx.StdWunderground, weewx.restx.StdPWSweather, weewx.restx.StdCWOP, weewx.restx.StdWOW, weewx.restx.StdWOWBE, weewx.restx.StdAWEKAS

report_services = weewx.engine.StdPrint, weewx.engine.StdReport

gary....@gmail.com

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Dec 2, 2025, 12:25:33 PM (4 days ago) Dec 2

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I see a mismatch in the units. If you are indeed using metric.

"target_unit = US # Options are 'US', 'METRICWX', or 'METRIC'"

michael.k...@gmx.at

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Dec 2, 2025, 12:47:28 PM (4 days ago) Dec 2

to weewx-user

The target unit specifies the unit system for the database. Where is the mismatch? Having the target_unit set to US shouldn't have any effects outside the database. https://weewx.com/docs/5.2/reference/weewx-options/stdconvert/?h=target_unit#target_unit

WeatherWatch

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Dec 2, 2025, 1:05:40 PM (4 days ago) Dec 2

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What about the comment # DO NOT MODIFY THIS VALUE UNLESS YOU KNOW WHAT YOU ARE DOING!

And I'm sure I saw something about that was just the format in which the database stored info, changing the format for a populated db could cause corruption.

michael.k...@gmx.at

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Dec 2, 2025, 1:16:45 PM (4 days ago) Dec 2

to weewx-user

All about this comment is written in the docs. https://weewx.com/docs/5.2/reference/weewx-options/stdconvert/?h=target_unit#target_unit

And if you want to change it, there is a documented process you can follow, which also contains more information about this commnt: https://weewx.com/docs/5.2/custom/database/#change-unit-system

WeatherWatch

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Dec 2, 2025, 1:20:57 PM (4 days ago) Dec 2

to weewx-user

Thank you Michael that might be what I read, if not it was very similar.

WeatherWatch

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Dec 2, 2025, 1:42:44 PM (4 days ago) Dec 2

to weewx-user

I'm not really bothered how the db stores it but more interested in how it handles it and what is actually sent to Wu and my webpage, if it was a simple unit conversion issue I can't see how circa 15mm would become 900+mm 🤷🏻‍♂️

vince

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Dec 2, 2025, 1:52:10 PM (4 days ago) Dec 2

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I usually start by doing a little visual inspection. What do your graphs and NOAA reports look like ? Does the db agree ? Do you see any spikes in readings or other seeming anomalies ?

WeatherWatch

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Dec 2, 2025, 4:11:25 PM (3 days ago) Dec 2

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I can't post images here but all WeeWX and WU data (Wind speed, direction, gust, temp, humidity and pressure all follow) WLL data (allowing for rounding) but rain is way off, 15mm vs 939mm yesterday and 2mm vs 127mm today, each is in the order of approximately 63x, could WeeWX be using rain rate per hour as accumulation in error.

John Smith

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Dec 2, 2025, 6:45:35 PM (3 days ago) Dec 2

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Based on the values you posted it sounds like you've crossed the rain amounts with the rain rate somewhere...

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