Climate almanac
Normal
Illinois, United States · 40.51°, -88.99°
What is the climate like in Normal?
The best time to visit Normal is typically August – September, with trip comfort peaking in September (7.5/10). Normal is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 22°F (-6°C). The wettest month is typically May and the driest is December; the year sees roughly 42 in (1074 mm) of precipitation.
- Best time to visitAugust – September — comfort peaks in September (7.5/10)
- Warmest monthJuly — average high 85°F (29°C)
- Coolest monthJanuary — average low 22°F (-6°C)
- Wettest monthMay (5.0 in (127 mm))
- Driest monthDecember (2.3 in (59 mm))
- Annual precipitation42 in (1074 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromNormal 4ne, 5 km away (1977-2026)