London Climate by Month – Rainy Season, Temperature Averages
Summary
The climate figures for London are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 719 mm.
The rainy season runs –. The wettest month is October with 78.3 mm across 12 rain days; the driest is April at just 40.2 mm.
The hottest month is July (average high 22.9°C) and the coolest is January (7.6°C).
The most comfortable time to visit London is April — less rain and milder heat.
Monthly averages · 2016–2025
| Monthly averages | High | Low | Rainfall | Rainy season |
|---|---|---|---|---|
| January | 7.6° | 1.8° | 63 mm | 12 |
| February | 9.3° | 2.9° | 54 mm | 11 |
| March | 11.2° | 4.0° | 57 mm | 13 |
| April | 14.2° | 5.2° | 40 mm | 9 |
| May | 17.9° | 8.7° | 55 mm | 11 |
| June | 21.3° | 12.2° | 63 mm | 10 |
| July | 22.9° | 14.3° | 60 mm | 10 |
| August | 22.6° | 14.0° | 49 mm | 9 |
| September | 19.9° | 11.8° | 64 mm | 11 |
| October | 15.6° | 9.0° | 78 mm | 12 |
| November | 10.9° | 5.2° | 69 mm | 12 |
| December | 9.0° | 4.0° | 67 mm | 12 |