Basin
Montana, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and Climate
Basin, MT

  • The average high temperature in September: 21.7°C

The warmest month (with the highest average high temperature) is July (28.3°C).
The month with the lowest average high temperature is January (1.1°C).

  • The average low temperature in September: 2.8°C

The month with the highest average low temperature is July (8.9°C).
The coldest month (with the lowest average low temperature) is January (-12.2°C).

  • The average rainfall in September: 26.2mm

The wettest month (with the highest rainfall) is June (62.5mm).
The driest month (with the lowest rainfall) is February (14.7mm).

  • The average snowfall in September: 22.6mm

The month with the highest snowfall is January (271.3mm).
The month with the lowest snowfall is August (0mm).

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