Climate Insights for London

The climate in London is cool. The average annual temperature is 9°C and approximately 1,047 mm of precipitation falls per year. London receives a notable amount of rainfall throughout the year, including during its driest month. London is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -7°C. Snowfall occurs from January to December, with around 148cm accumulating over the season.The climate in London is cool. The average annual temperature is 49°F and approximately 41.2 in of precipitation falls per year. London receives a notable amount of rainfall throughout the year, including during its driest month. London is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to 20°F. Snowfall occurs from January to December, with around 58in accumulating over the season.

Temperatures in London vary considerably across the year, with a 34°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -7°C and the daily average is -4°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.Temperatures in London vary considerably across the year, with a 61°F difference between the coldest and warmest months. The warmest month is July, when average highs reach 81°F and the mean temperature sits around 71°F. The coldest month is January, when overnight lows fall to 20°F and the daily average is 25°F. On average, daily temperatures fluctuate by about 16°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 13°F shift in average temperatures.

London is a moderately rainy area, receiving approximately 1,047 mm of precipitation annually, which averages out to around 87 mm per month. The wettest month is August, averaging 105 mm of rainfall. April and July also tend to see above-average precipitation. The driest month is September, with just 68 mm. That's 37 mm less than August, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 148cm accumulating over the season. January typically sees the most snow at around 37cm.London is a moderately rainy area, receiving approximately 41.2 in of precipitation annually, which averages out to around 3.4 in per month. The wettest month is August, averaging 4.1 in of rainfall. April and July also tend to see above-average precipitation. The driest month is September, with just 2.7 in. That's 1.5 in less than August, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 58in accumulating over the season. January typically sees the most snow at around 15in.

London is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 15km/h in winter, 14km/h in spring, 11km/h in summer, 13km/h in autumn.London is moderately windy, with an average annual wind speed of 8mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 9mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 6mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3mph gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 9mph in winter, 8mph in spring, 7mph in summer, 8mph in autumn.

The best time to visit London is during June and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 82 mm per month. By contrast, July can be uncomfortably hot with highs reaching 27°C, while January is the coldest period with lows dropping to -7°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit London is during June and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 65°F with modest rainfall averaging 3.2 in per month. By contrast, July can be uncomfortably hot with highs reaching 81°F, while January is the coldest period with lows dropping to 20°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for London based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for London based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in inches (in) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.