Herstal Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to chilly in Herstal. On average, daytime temperatures range from a comfortable 24°C (75°F) in July to a chilly 6°C (43°F) in January.

Nighttime temperatures range from 14°C (57°F) in July to 1°C (34°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Herstal has a moderate amount of precipitation, averaging 962 mm (38 in) of rain/snowfall annually. The wettest period in Herstal occurs in December, which receives around 97 mm (3.8 in) of precipitation. During the driest month, April, Herstal experiences moderate rainfall, totaling 63 mm (2.5 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Herstal Precipitation page.

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

The average number of days each month with precipitation

In Herstal, summer days are longer and more sunny, with daily sunshine hours peaking at 7.0 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.

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 Herstal.

The city experiences its highest humidity in December, reaching 88%. In April, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year