Regarding UK hourly site-specific observations, I am receiving an XML feed from the API.
I have received an update at 08:00 today, an extract from which is shown below. As you can see the weather type for 08:00 (and indeed for all morning hours prior to 08:00) is being reported as 0, i.e. 'clear night'. Surely that can't be right (i.e. it's no longer night!)
...
<DV dataDate="2014-12-03T08:00:00Z" type="Obs">
<Location i="3772" lat="51.479" lon="-0.4491" name="HEATHROW" country="ENGLAND" continent="EUROPE" elevation="25.0">
<Period type="Day" value="2014-12-02Z">
<Rep D="N" H="97.3" P="1016" S="9" T="7.6" V="5000" W="11" Pt="R" Dp="7.2">540</Rep>
...
</Period>
<Period type="Day" value="2014-12-03Z">
<Rep D="N" H="69.5" P="1023" S="14" T="6.5" V="23000" W="7" Pt="R" Dp="1.4">0</Rep>
<Rep D="N" H="73.0" P="1023" S="13" T="5.6" V="26000" W="0" Pt="R" Dp="1.2">60</Rep>
<Rep D="N" H="76.0" P="1023" S="10" T="4.9" V="27000" W="0" Pt="R" Dp="1.1">120</Rep>
<Rep D="N" H="79.4" P="1024" S="11" T="4.5" V="35000" W="0" Pt="R" Dp="1.3">180</Rep>
<Rep D="N" G="22" H="79.3" P="1024" S="10" T="4.4" V="27000" W="0" Pt="R" Dp="1.2">240</Rep>
<Rep D="N" H="79.4" P="1024" S="9" T="4.5" V="30000" W="0" Pt="R" Dp="1.3">300</Rep>
<Rep D="N" H="81.7" P="1024" S="10" T="4.2" V="29000" W="0" Pt="R" Dp="1.4">360</Rep>
<Rep D="N" H="84.1" P="1024" S="8" T="4.0" V="24000" W="0" Pt="R" Dp="1.6">420</Rep>
<Rep D="N" H="83.5" P="1024" S="8" T="4.2" V="27000" W="0" Pt="R" Dp="1.7">480</Rep>
</Period>
</Location>
</DV>