Chicago weather in January 2025

Expect -1°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Chicago in January. Check more long-term weather averages for Chicago in January before you book your next holiday to Illinois in 2025/2026.

  • -1°C maximum daytime temperature in January in Chicago-1
    -1°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in January in Chicago12
    12 days with some rainfall
  • -10°C minimum night-time temperature in January in Chicago-10
    -10°C min night temperature
  • 10 hours of daylight per day in January in Chicago10
    10 hours of daylight per day
  • No heat & humidity in January in Chicago0
    No heat & humidity
  • 44 mm monthly rainfall in January in Chicago44
    44 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Chicago1
    1 (Low) UV index
  • 4°C sea temperature in January in Chicago4
    4°C sea temperature

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