Temperature for October
In Great Falls, MT during October the average high temperature is 60.8°F. The hottest day on record was October 1, 1992 when the temperature hit 90.0°F.

In Great Falls, MT during October the average high temperature is 60.8°F. The hottest day on record was October 1, 1992 when the temperature hit 90.0°F.
In October the average monthly rainfall in Great Falls, MT is 1.00 inches with rain usually falling on between 5 and 6 days. 1987 was the driest October with only 0.02 inches of rain falling, and 1994 was the wettest October with 2.80 inches of rain. The wettest single day in October was 14 October 1975 when 0.94 inches of rain fell.
In October it usually snows on between 3 and 4 days. In October there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in October.