Hmmm.
Tricky month to call - day time temps for first part look average but given unsettled nature of the weather night time temps likely to be a bit above average, giving above average CET overall. With the PV looking disrupted there's a chance of a cold spell cropping up, which would probably be enough to drag CET to a bit below average.
I'll take a daft gamble and go with 3.7c, meaning January has a massive swing temp wise from December.
Now watch a mild south westerly set in and doom me to starting next years competition in much the same way as I ended this years
Home: Tunbridge Wells
Work: Tonbridge