Climate almanac

Belvidere

Illinois, United States · 42.26°, -88.84°

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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)