London · United Kingdom · 1995–2024 averages
London weather, month by month. July is the pick.
Thirty years of averages for London, United Kingdom — how hot it really feels, when the rain arrives, and what the air is like. July comes out on top; January is the one to skip.
The year at a glance
Tap a month for its full breakdown.
July
bestscore 84.9/100Mild, sticky and dryish, with clean air.
- Feels like
- 21°
- mild
- Real temp
- 22°
- mild
- Humidity
- 72%
- sticky
- Rain
- 57mm
- dryish
- Cloud cover
- 63%
- mixed
- Air quality
- 40
- clean
- Daylight
- 16.1h
- long days
Month by month, metric by metric
Each row is one measure across the same twelve months. The tint says how good that month is for it, the word says why.
- Good
- Okay
- Rough
- Grim
Feels like
peaks at 21° in July
- Jan4°freezing
- Feb4°freezing
- Mar7°cold
- Apr10°cold
- May15°cool
- Jun19°cool
- Jul21°mild
- Aug21°mild
- Sep17°cool
- Oct13°cold
- Nov8°cold
- Dec4°freezing
Real temp
7–22° in the shade across the year
- Jan7°cold
- Feb8°cold
- Mar11°cold
- Apr14°cool
- May17°cool
- Jun20°cool
- Jul22°mild
- Aug22°mild
- Sep19°cool
- Oct15°cool
- Nov11°cold
- Dec8°cold
Humidity
72% at its driest, 88% at its most oppressive
- Jan87%soupy
- Feb83%sweaty
- Mar80%sweaty
- Apr75%sweaty
- May74%sticky
- Jun73%sticky
- Jul72%sticky
- Aug75%sweaty
- Sep78%sweaty
- Oct83%sweaty
- Nov87%soupy
- Dec88%soupy
Rain
66mm in November, 46mm in March
- Jan57mmdryish
- Feb50mmdryish
- Mar46mmdryish
- Apr46mmdryish
- May55mmdryish
- Jun57mmdryish
- Jul57mmdryish
- Aug60mmdryish
- Sep50mmdryish
- Oct65mmdryish
- Nov66mmdryish
- Dec60mmdryish
Cloud cover
63% at its clearest, 73% at its greyest
- Jan73%grey
- Feb72%grey
- Mar71%grey
- Apr65%mixed
- May67%mixed
- Jun66%mixed
- Jul63%mixed
- Aug64%mixed
- Sep66%mixed
- Oct70%grey
- Nov72%grey
- Dec73%grey
Air quality
worst in March, cleanest in July
- Jan52moderate
- Feb51moderate
- Mar54moderate
- Apr54moderate
- May49clean
- Jun45clean
- Jul40clean
- Aug41clean
- Sep45clean
- Oct44clean
- Nov50clean
- Dec48clean
Daylight
7.9h to 16.5h of daylight across the year
- Jan8.4hshort
- Feb10hshortish
- Mar11.9hshortish
- Apr13.9heven
- May15.6hlong days
- Jun16.5hlong days
- Jul16.1hlong days
- Aug14.5hlong days
- Sep12.6heven
- Oct10.7hshortish
- Nov8.9hshort
- Dec7.9hdark
London's air, month by month
The air is at its worst in March at 54 AQI (moderate), and at its cleanest in July at 40 (clean). It tracks the seasons closely.
Every month in full
All twelve months, all seven measures.
| Month | Feels like | Real temp | Humidity | Rain | Cloud cover | Air quality | Daylight |
|---|---|---|---|---|---|---|---|
| January | 4° freezing | 7° cold | 87% soupy | 57mm dryish | 73% grey | 52 moderate | 8.4h short |
| February | 4° freezing | 8° cold | 83% sweaty | 50mm dryish | 72% grey | 51 moderate | 10h shortish |
| March | 7° cold | 11° cold | 80% sweaty | 46mm dryish | 71% grey | 54 moderate | 11.9h shortish |
| April | 10° cold | 14° cool | 75% sweaty | 46mm dryish | 65% mixed | 54 moderate | 13.9h even |
| May | 15° cool | 17° cool | 74% sticky | 55mm dryish | 67% mixed | 49 clean | 15.6h long days |
| June | 19° cool | 20° cool | 73% sticky | 57mm dryish | 66% mixed | 45 clean | 16.5h long days |
| July | 21° mild | 22° mild | 72% sticky | 57mm dryish | 63% mixed | 40 clean | 16.1h long days |
| August | 21° mild | 22° mild | 75% sweaty | 60mm dryish | 64% mixed | 41 clean | 14.5h long days |
| September | 17° cool | 19° cool | 78% sweaty | 50mm dryish | 66% mixed | 45 clean | 12.6h even |
| October | 13° cold | 15° cool | 83% sweaty | 65mm dryish | 70% grey | 44 clean | 10.7h shortish |
| November | 8° cold | 11° cold | 87% soupy | 66mm dryish | 72% grey | 50 clean | 8.9h short |
| December | 4° freezing | 8° cold | 88% soupy | 60mm dryish | 73% grey | 48 clean | 7.9h dark |
London weather questions
- What is the best time to visit London?
- July scores best across temperature, rain, humidity and air quality — 21° feels-like, 57mm of rain and 72% humidity. January is the month to avoid: 57mm of rain and 52 AQI.
- How hot does London get?
- July is the peak, at 21° feels-like (22° in the shade) — mild. Even in July it reaches 21°.
- When is the rainy season in London?
- November is the wettest month at 66mm, and March the driest at just 46mm.
- Is air quality a problem in London?
- March is the worst month at 54 AQI (moderate), and July the best at 40 (clean).
Weather normals from Open-Meteo (ERA5 reanalysis, 1995–2024) and CAMS air quality (2015–2024), licensed CC-BY-4.0. Contains modified Copernicus Climate Change Service information. These are long-run averages, not forecasts — any given year will differ.
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