Great Falls, MT weather in September 1978

Temperature for September 1978

In September 1978 the average high temperature in Great Falls, MT was 75.2°F, and this was 1.4°F warmer than the average of 73.9°F. The hottest day in September 1978 was 4 September when the temperature reached 95.0°F. Overnight the average temperature in September is 42.9°F and in 1978 the average overnight temperature was 2.1°F warmer at 45.1°F.

Precipitation for September 1978

In September the average monthly rainfall in Great Falls, MT is 1.36 inches with rain usually falling on 6 days. In September 1978 there was a total of 2.42 inches of rain, that fell on 11 days.