Great Falls, MT weather in September 1991

Temperature for September 1991

In September 1991 the average high temperature in Great Falls, MT was 74.3°F, and this was 0.4°F warmer than the average of 73.9°F. The hottest day in September 1991 was 1 September when the temperature reached 96.1°F. Overnight the average temperature in September is 42.9°F and in 1991 the average overnight temperature was 2.6°F warmer at 45.5°F.

Precipitation for September 1991

In September the average monthly rainfall in Great Falls, MT is 1.36 inches with rain usually falling on 6 days. In September 1991 there was a total of 1.07 inches of rain, that fell on 6 days.