London has a temperate climate; warm summers and mild winters.
Average high temperatures:
Jan: 8C (46F)
Feb: 8C (46F)
Mar: 11C (52F)
Apr: 14C (58F)
May: 18C (64F)
Jun: 21C (70F)
Jul: 24C (76F)
Aug: 23C (74F)
Sep: 20C (68F)
Oct: 16C (61F)
Nov: 11C (52F)
Dec: 9C (48F)
Average rainfall: 584mm (23 inches)
Annual rainy days: 106
Annual snowy days: 2
Annual fog days: 3
This week it will be between 13-14C (55-58F), mostly sunny with some showers. The average temperature at the start of December is 10C (50F)