Climate almanac
De Witt
Iowa, United States · 41.82°, -90.54°
What is the climate like in De Witt?
The best time to visit De Witt is typically June – September, with trip comfort peaking in August (6.9/10). De Witt is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 18°F (-8°C). The wettest month is typically May and the driest is February; the year sees roughly 40 in (1007 mm) of precipitation.
- Best time to visitJune – September — comfort peaks in August (6.9/10)
- Warmest monthJuly — average high 85°F (29°C)
- Coolest monthJanuary — average low 18°F (-8°C)
- Wettest monthMay (5.0 in (128 mm))
- Driest monthFebruary (2.0 in (50 mm))
- Annual precipitation40 in (1007 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromClinton #1, 23 km away (1893-2026)