Temperature for September 2005
In September 2005 the average high temperature in Great Falls, MT was 72.9°F, and this was 1.0°F cooler than the average of 73.9°F. The hottest day in September 2005 was 4 September when the temperature reached 91.0°F. Overnight the average temperature in September is 42.9°F and in 2005 the average overnight temperature was 1.4°F cooler at 41.5°F.