Heerlen

What is the climate like in Heerlen?

The best time to visit Heerlen is typically June – September, with trip comfort peaking in August (7.2/10). Heerlen is warmest in August, when daily highs average 75°F (24°C), and coolest in January, when lows fall to about 35°F (2°C). The wettest month is typically January and the driest is April; the year sees roughly 33 in (833 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in August (7.2/10)
• Warmest monthAugust — average high 75°F (24°C)
• Coolest monthJanuary — average low 35°F (2°C)
• Wettest monthJanuary (3.4 in (86 mm))
• Driest monthApril (2.1 in (52 mm))
• Annual precipitation33 in (833 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromMaastricht, 16 km away (1906-2026)