Great Falls, MT weather in September 1984

Temperature for September 1984

In September 1984 the average high temperature in Great Falls, MT was 67.3°F, and this was 6.6°F cooler than the average of 73.9°F. The hottest day in September 1984 was 19 September when the temperature reached 91.0°F. Overnight the average temperature in September is 42.9°F and in 1984 the average overnight temperature was 4.3°F cooler at 38.6°F.

Precipitation for September 1984

In September the average monthly rainfall in Great Falls, MT is 1.36 inches with rain usually falling on 6 days. In September 1984 there was a total of 1.08 inches of rain, that fell on 9 days.