Great Falls, MT weather in September 2011

Temperature for September 2011

In September 2011 the average high temperature in Great Falls, MT was 80.8°F, and this was 6.9°F warmer than the average of 73.9°F. The hottest day in September 2011 was 25 September when the temperature reached 91.0°F. Overnight the average temperature in September is 42.9°F and in 2011 the average overnight temperature was 3.5°F warmer at 46.4°F.

Precipitation for September 2011

In September the average monthly rainfall in Great Falls, MT is 1.36 inches with rain usually falling on 6 days. In September 2011 there was a total of 0.27 inches of rain, that fell on 0 days.