Great Falls weather in January 2025

Expect -2°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Great Falls in January. Check more long-term weather averages for Great Falls in January before you book your next holiday to Montana in 2025/2026.

  • -2°C maximum daytime temperature in January in Great Falls-2
    -2°C max day temperature
  • 4 hours of sunshine per day
  • 9 days with some rainfall in January in Great Falls9
    9 days with some rainfall
  • -12°C minimum night-time temperature in January in Great Falls-12
    -12°C min night temperature
  • 9 hours of daylight per day in January in Great Falls9
    9 hours of daylight per day
  • No heat & humidity in January in Great Falls0
    No heat & humidity
  • 20 mm monthly rainfall in January in Great Falls20
    20 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Great Falls1
    1 (Low) UV index

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