Montana, USA
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Basin, MT

  • Average high temperature in September: 71°F

Warmest month (with highest average high temperature) is July (83°F).
Month with lowest average high temperature is January (34°F).

  • Average low temperature in September: 37°F

Month with highest average low temperature is July (48°F).
Coldest month (with lowest average low temperature) is January (10°F).

  • Average rainfall in September: 1"

Wettest month (with highest rainfall) is June (2.5").
Driest month (with lowest rainfall) is February (0.6").

  • Average snowfall in September: 0.9"

Month with highest snowfall is January (10.7").
Month with lowest snowfall is August (0").