Climate almanac
Belvidere
Illinois, United States · 42.26°, -88.84°
What is the weather like in Belvidere in September?
In September, Belvidere is typically 76°F (25°C) during the day and 58°F (14°C) at night. The month brings about 3.7 in (94 mm) of precipitation in total.
- Average high76°F (25°C)
- Average low58°F (14°C)
- Precipitation3.7 in (94 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)