Climate almanac
Belvidere
Illinois, United States · 42.26°, -88.84°
What is the climate like in Belvidere?
The best time to visit Belvidere is typically June – September, with trip comfort peaking in August (6.8/10). Belvidere is warmest in July, when daily highs average 83°F (28°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 39 in (993 mm) of precipitation.
- Best time to visitJune – September — comfort peaks in August (6.8/10)
- Warmest monthJuly — average high 83°F (28°C)
- Coolest monthJanuary — average low 18°F (-8°C)
- Wettest monthMay (4.9 in (126 mm))
- Driest monthFebruary (1.9 in (47 mm))
- Annual precipitation39 in (993 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromRockford Gtr Rockford AP, 22 km away (1951-2026)