Climate almanac

Johnsburg

Illinois, US · 42.38°, -88.24°

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What is the climate like in Johnsburg?

The best time to visit Johnsburg is typically June – September, with trip comfort peaking in September (6.9/10). Johnsburg is warmest in July, when daily highs average 83°F (28°C), and coolest in January, when lows fall to about 19°F (-7°C). The wettest month is typically May and the driest is February; the year sees roughly 38 in of precipitation.

  • Best time to visitJune – September — comfort peaks in September (6.9/10)
  • Warmest monthJuly — average high 83°F (28°C)
  • Coolest monthJanuary — average low 19°F (-7°C)
  • Wettest monthMay (4.7 in)
  • Driest monthFebruary (1.9 in)
  • Annual precipitation38 in