Great Falls, MT weather in September 1990

Temperature for September 1990

In September 1990 the average high temperature in Great Falls, MT was 82.2°F, and this was 8.3°F warmer than the average of 73.9°F. The hottest day in September 1990 was 26 September when the temperature reached 88.0°F. Overnight the average temperature in September is 42.9°F and in 1990 the average overnight temperature was 0.9°F warmer at 43.8°F.

Precipitation for September 1990

In September the average monthly rainfall in Great Falls, MT is 1.36 inches with rain usually falling on 6 days. In September 1990 there was a total of 0.10 inches of rain, that fell on 1 days.