Willisau

What is the climate like in Willisau?

The best time to visit Willisau is typically July, the year's most comfortable month (6.3/10). Willisau is warmest in July, when daily highs average 73°F (23°C), and coolest in January, when lows fall to about 28°F (-2°C). The wettest month is typically May and the driest is February; the year sees roughly 62 in (1573 mm) of precipitation.

• Best time to visitJuly — the year's comfort peak (6.3/10)
• Warmest monthJuly — average high 73°F (23°C)
• Coolest monthJanuary — average low 28°F (-2°C)
• Wettest monthMay (6.9 in (174 mm))
• Driest monthFebruary (3.6 in (92 mm))
• Annual precipitation62 in (1573 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromZuerich/fluntern, 52 km away (1901-2026)