Climate in London — Annual Weather Overview
London has a oceanic climate — mild temperatures year-round with regular rainfall. The hottest month is August (average high 22.7°C) and the coolest is January (7.9°C). There is a noticeable seasonal temperature shift of 14.8°C between August and January. Annual rainfall totals around 748mm. October is the wettest month at 112.4mm, while April averages just 34.8mm. Average daily sunshine is 7.8 hours.
**Spring (March, April, May):** average highs 14.2°C, 144mm rain. **Summer (June, July, August):** average highs 22.3°C, 183mm rain. **Autumn (September, October, November):** average highs 16.2°C, 230mm rain. **Winter (December, January, February):** average highs 8.8°C, 190mm rain.
London — Monthly Temperatures
London — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in London stays reasonable all year.
London weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 7.9°C | 1.9°C | 63.3mm | 4.2h | 11 | 10/10 |
| February | 9.7°C | 3.1°C | 53.2mm | 5.2h | 10 | 10/10 |
| March | 11.2°C | 3.7°C | 55.7mm | 6.6h | 12 | 10/10 |
| April | 14.0°C | 4.2°C | 34.8mm | 10.0h | 7 | 10/10 |
| May | 17.4°C | 8.0°C | 54.0mm | 11.0h | 10 | 10/10 |
| June | 21.5°C | 11.9°C | 70.3mm | 11.5h | 11 | 10/10 |
| July | 22.6°C | 13.9°C | 59.5mm | 11.5h | 12 | 10/10 |
| August | 22.7°C | 14.2°C | 53.6mm | 10.2h | 8 | 10/10 |
| September | 20.8°C | 12.2°C | 45.2mm | 8.9h | 9 | 10/10 |
| October | 16.1°C | 9.3°C | 112.4mm | 6.5h | 16 | 9/10 |
| November | 11.6°C | 5.5°C | 72.5mm | 4.8h | 12 | 10/10 |
| December | 8.7°C | 3.6°C | 73.4mm | 3.3h | 12 | 10/10 |
For the full verdict on when to go, see the best time to visit London. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does London have?
London has a oceanic climate — mild temperatures year-round with regular rainfall. Average highs range from 7.9°C in January to 22.7°C in August.
What is the hottest month in London?
August is the hottest month in London, with average highs of 22.7°C and lows of 14.2°C.
What is the coldest month in London?
January is the coolest month, with average highs of 7.9°C and lows of 1.9°C.
What is the wettest month in London?
October is the wettest month, averaging 112.4mm of rainfall over around 16 rainy days.
How much rain does London get per year?
London receives around 748mm of rain per year. The driest month is April (34.8mm).
When is the best time to visit London?
The best time to visit London is All year. See the full month-by-month guide →
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Trip essentials for London
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.