Heathrow Climate by Month
The temperature in Heathrow can vary quite a bit throughout the year.
Temperatures can be warm during the warmest months,
and cold during the cooler months.
It receives a moderate amount of precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
Visitors to Heathrow can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 23°C in July to a chilly 9°C in January. Nighttime temperatures can drop, with averages reaching 3°C in January.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Generally, Heathrow experiences moderate precipitation patterns, averaging 718 mm yearly. The wettest period in Heathrow occurs in November, which receives around 68 mm of precipitation. During the driest month, March, Heathrow experiences moderate rainfall, totaling approximately 48 mm. The consistent precipitation levels throughout the year contribute to a relatively stable climate.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Heathrow, summer days are longer and more sunny, with daily sunshine hours peaking at 7.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.8 hours per average day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is moderate throughout the year in Heathrow.
Relative humidity over the year
Average wind speed
The mean wind speed over the year in Heathrow ranges from 3°C in May to 4°C in January.
The mean monthly wind speed over the year (meters per second)
The best time of year to visit Heathrow in the United Kingdom
During the months of June, July and August you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 23°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 9°C.
November tops the wettest month list with 68 mm of rainfall.
March is the driest month with 48 mm of precipitation.
July is the sunniest month with an average of 219 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
