Copley September 2025 report

[Ken Cook]

Reports for September 2025 for the Copley sites. (Averages refer to 1991-2020)

 Cool and wet, normal sunshine.

(Differences from 1991-2020 averages in brackets)

 

Copley Lead Mill site 218metres asl

Temperature °C (09Z-09Z)

Mean maximum   15.0 (-1.0)  High 19.1 on 7th,  Low 10.9 on 20th

Mean minimum      5.7 (-1.7)  Low  -0.6 on 22nd,  High 11.7 on 3rd

Mean screen          10.3 (-1.4)

Mean 30cm earth   12.4 (-1.0)

Air frost   1 (1)

Days snow lying 50% 09Z, 0 (0) snow on ground 0

Max depth 09Z  0cm on 0th

River Gaunless data (Copley Lead Mill Environment Agency monitoring site 09Z daily readings)

Mean level 0.09m, high 0.25m on 21st, low 0.07m on 1st ((normal 0.00m to 0.60m)

Mean river temperature 09Z  9.9, high 12.5 on 19th, low 8.0 on 22nd

 

Copley Met O site 253metres asl

Temperature °C (09Z-09Z)

Mean maximum  15.8 (-0.2)  High 19.2 on 7th, Low 10.8 on 20th

Mean minimum     7.0 (-1.2)  Low   0.6 on 22nd, High 12.2 on 19th

Mean screen        11.4 (-0.7)

Mean grass minimum  2.8 (-2.0)  Low -5.0 on 22nd

Mean concrete minimum  6.9 (-1.1) Low 0.5 on 22nd

Mean 30cm earth    14.1 (0.0)

Mean 100cm earth  14.3 (0.5)

Air frost 0 (0) 0 hours

Ground frost  9 (4)

Concrete frost  0 (0)

 

Precipitation mm (09Z-09Z)

Total  112.5 (168%) High 37.7 on 20th

Days 0.2mm  20 (5)

Days 1.0mm  18 (9)

Hail  0 (0)

Thunder  1 (0)

 

Snow cm

Days falling 0 (0)

Days lying 50% 09Z, 0 (0) snow on ground 0

Fresh falls 09Z  0cm (0cm)

Max depth 09Z  0cm on 0th

 

Sunshine hr (R&D electronic recorder)                                Sunshine hr (Campbell Stokes)

Total             125.2(94%)                                                                129.8(89%)

Max day          11.1 on 22nd                                                             10.2 on 22nd

Average daily   4.2 (33% of the possible 12.8hr / day)                     4.3 (33% possible)

Days no sun      0 (-2)                                                                        0 (-3) 

Fog (Vis <1km 09Z), 1 (0)

 

Pressure mb  (mean sea level)

Average 09Z  1012.1  (-2.5)

High 24hr       1031.7 on 23rd

Low 24hr          998.1 on 15th

 

Wind KT (Davis recorder)

Mean   SW 6.3 (-2.3) High gust 33 on 19th

Gale days  0 (0) 

Ken Cook, Copley, Teesdale / Weardale watershed