Temperature for December 1986
In December 1986 the average high temperature in Great Falls, MT was 44.3°F, and this was 7.6°F warmer than the average of 36.7°F. The hottest day in December 1986 was 2 December when the temperature reached 53.1°F. Overnight the average temperature in December is 16.8°F and in 1986 the average overnight temperature was 6.2°F warmer at 23.0°F.