London climate by month
Warmest month: July (highs about 24°C). Coolest: January (about 9°C). Wettest: November (60 mm). Driest: July (36 mm).
Source: Met Office, Greenwich, Observatory, 1991-2020 averages (Open Government Licence v3.0). Daylight is calculated from the latitude of London for the 15th of each month. Greenwich Observatory is the nearest Met Office station with a full 1991-2020 table to central London (about 5.6 miles (9 km) east of Charing Cross; Hampstead, closer, publishes no table). Kew Gardens (gcpuc7fds) and Heathrow (gcpsveqyg) on the west side have similar averages. St James's Park is not a listed station. Greenwich rainfall is lower than Kew's (563 mm a year against 627 mm).