Heerlen Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Heerlen.
Climate overview of Heerlen
Heerlen, Limburg, Netherlands, experiences significant temperature variation throughout the year. Summers bring daytime highs of 24°C (75°F) in July, while winters cool to 7°C (45°F) in January.
Heerlen sees a moderate amount of rain/snowfall, totalling around 869 mm (34 in) per year. It experiences warm summers and cold winters, creating some seasonal variation. The most sunshine falls in July, with an average of 7.0 hours of daily sunshine.
Heerlen Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Heerlen - and find the best time to visit.
Monthly Temperature in Heerlen
Depending on the time of the year, temperatures range from comfortable to chilly in Heerlen. Average maximum daytime temperatures range from a comfortable 24°C (75°F) in July, the warmest time of the year, to a chilly 7°C (45°F) during cooler months like January.
At night, you can expect temperatures ranging from 14°C (57°F) in July to around 1°C (34°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Heerlen
Generally, Heerlen has a moderate amount of precipitation, averaging 869 mm (34 in) of rain/snowfall annually. Year-round, Heerlen has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 85 mm (3.3 in), and the driest month, April, with 56 mm (2.2 in), is minimal. For more details, please visit our Heerlen Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Heerlen
Seasonal changes in sunshine hours are quite dramatic in Heerlen. While July receives considerable daily sunshine with up to 7.0 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
Humidity in Heerlen by Month
The relative humidity is high throughout the year in Heerlen.
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
Wind Speed in Heerlen
The mean wind speed over the year ranges from 4 m/s (8 knots) in April, May, June, July, August, September and October to 5 m/s (10 knots) in January, February, March, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Heerlen
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: May, June and July
- Seasonal pattern: Warm summers and cold winters
Frequently asked questions about the climate in Heerlen
What is the best time to visit Heerlen?
June, July, August and September typically offer the most optimal weather in Heerlen. In contrast, January, February, November and December tend to have less optimal conditions. Heerlen has warm summers and cold winters.
What temperatures can I expect in Heerlen?
Daytime highs range from 7°C (45°F) in January to 24°C (75°F) in July. Nighttime lows range from 1°C (34°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Heerlen get?
Annual rainfall is around 869 mm (34 in). December is the wettest month with 85 mm (3.3 in), while April is the driest with 56 mm (2.2 in).
How sunny is Heerlen?
Heerlen receives around 1,702 hours of sunshine per year. July is the sunniest month with 211 hours, while December is the cloudiest with just 55 hours.
Heerlen 3-Day Forecast
Heerlen on the map
Heerlen is highlighted - select any city to see its climate.
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