London weather at a glance
Hottest
July · 24°C
Coldest
January · 2°C
Wettest
October · 69 mm
Best season
May, June, July, August, September
When is the best time to visit London
London has an oceanic (temperate maritime) climate. In summer (Jun–Aug) the average high is around 23°C, while in winter (Dec–Feb) it sits near 8°C by day and 2°C at night. The hottest month is July (24°C) and the coldest is January (2°C).
The best time to visit is May, June, July, August, September, when conditions are most comfortable for sightseeing and walking around. December, January, February can be less comfortable — keep that in mind when planning.
London temperatures & rainfall by month
Long-term monthly averages (climate normals).
| Month | High | Low | Daily range | Rain |
|---|---|---|---|---|
| Jan | 8° | 2° | 55 mm | |
| Feb | 9° | 2° | 41 mm | |
| Mar | 11° | 3° | 42 mm | |
| Apr | 14° | 5° | 44 mm | |
| May | 18° | 8° | 49 mm | |
| Jun● | 21° | 11° | 45 mm | |
| Jul | 24° | 14° | 45 mm | |
| Aug | 23° | 14° | 50 mm | |
| Sep | 20° | 11° | 49 mm | |
| Oct | 15° | 8° | 69 mm | |
| Nov | 11° | 5° | 59 mm | |
| Dec | 8° | 3° | 55 mm |
Seasons in London
Spring
14° / 5°
cool
Rain: ~45 mm/mo
Summer
23° / 13°
mild
Rain: ~47 mm/mo
Autumn
15° / 8°
cool
Rain: ~59 mm/mo
Winter
8° / 2°
cold
Rain: ~50 mm/mo
When to visit London
✓ Best months
May, June, July, August, September
~ Less comfortable
December, January, February
What to pack
- A warm jacket and layers — winter mornings and evenings are chilly.
- Comfortable walking shoes — you'll be on your feet around the centre.