Hemel Hempstead Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to chilly in Hemel Hempstead. Average maximum daytime temperatures range from a comfortable 23°C (73°F) in July, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.

At night, you can expect temperatures ranging from 13°C (55°F) in July to around 2°C (36°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Hemel Hempstead has a moderate amount of precipitation, averaging 731 mm (29 in) of rain/snowfall annually. Year-round, Hemel Hempstead has a balanced climate with minimal variation in precipitation. The difference between the wettest month, August, with 68 mm (2.7 in), and the driest month, March, with 50 mm (2 in), is minimal. For more details, please visit our Hemel Hempstead Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Hemel Hempstead. While July receives considerable daily sunshine with up to 7.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Hemel Hempstead.

The city experiences its highest humidity in November, reaching 81%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year