Great Falls, MT weather in September 1986

Temperature for September 1986

In September 1986 the average high temperature in Great Falls, MT was 63.6°F, and this was 10.3°F cooler than the average of 73.9°F. The hottest day in September 1986 was 5 September when the temperature reached 78.1°F. Overnight the average temperature in September is 42.9°F and in 1986 the average overnight temperature was 1.0°F cooler at 41.9°F.

Precipitation for September 1986

In September the average monthly rainfall in Great Falls, MT is 1.36 inches with rain usually falling on 6 days. In September 1986 there was a total of 2.10 inches of rain, that fell on 18 days.