These figures are from the 01.00 list on WeatherOnline:

Birmingham Airport: -3°C
Coleshill: -2.1°C
Coventry Airport: -2°C

but

Hereford/Credenhill: +2.7°C
Shawbury: +3.2°C

Here in Bewdley, we're on the "warm" side of things, with +2.8°C.

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Bewdley, Worcs. ~90m asl.