Climate almanac
Delavan
Wisconsin, United States · 42.63°, -88.64°
What is the climate like in Delavan?
The best time to visit Delavan is typically June – September, with trip comfort peaking in July (6.7/10). Delavan is warmest in July, when daily highs average 83°F (28°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically May and the driest is February; the year sees roughly 38 in (956 mm) of precipitation.
- Best time to visitJune – September — comfort peaks in July (6.7/10)
- Warmest monthJuly — average high 83°F (28°C)
- Coolest monthJanuary — average low 17°F (-8°C)
- Wettest monthMay (4.3 in (110 mm))
- Driest monthFebruary (1.7 in (44 mm))
- Annual precipitation38 in (956 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromDelavan Wwtp, 1 km away (2011-2026)