The hottest month in London is typically July, with daytime highs averaging around 22.9°C (73°F), based on 10 years of historical weather data. Overnight lows during this period average near 14.3°C (58°F).

What is the coldest month in London?

The coldest month in London is typically January, with overnight lows averaging around 1.8°C (35°F) and daytime highs near 7.6°C (46°F), based on 10 years of historical weather data.

Does London have a rainy season?

London doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. October is the wettest month on average (about 78 mm), while April is the driest (about 40 mm).

What's the best time of year to visit London?

The best time to visit London is typically July to August, when daytime highs average a comfortable 22.8°C (73°F). Rainfall during this window averages around 55 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is London's air quality safe right now?

As of the latest reading, London's air quality index (AQI) is 18, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.

Atmospheric Details

Wind

9 km/h

W · Light Breeze · Max 15 km/h

Humidity

91 %

High · feels muggy

UV Index

Moderate

Visibility

16 km

Excellent

Pressure

1013 hPa

Stable

Dew Point

15°C

Somewhat humid

Today vs Normal

21°C+1° above normal

The long-term average high for today is 20°C.

Air Quality

Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Health & Activity Advice

✅ Good for Outdoors

UV index is 3 today — low. Minimal sun protection is needed for most outdoor activity.

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Conditions are comfortable for outdoor activity at most points during the day today.