Climate almanac

Boulder Hill

Illinois, US · 41.71°, -88.34°

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What is the climate like in Boulder Hill?

The best time to visit Boulder Hill is typically August – September, with trip comfort peaking in September (7.0/10). Boulder Hill is warmest in July, when daily highs average 84°F (29°C), and coolest in January, when lows fall to about 20°F (-7°C). The wettest month is typically May and the driest is February; the year sees roughly 42 in of precipitation.

  • Best time to visitAugust – September — comfort peaks in September (7.0/10)
  • Warmest monthJuly — average high 84°F (29°C)
  • Coolest monthJanuary — average low 20°F (-7°C)
  • Wettest monthMay (5.0 in)
  • Driest monthFebruary (2.2 in)
  • Annual precipitation42 in