Great Falls, MT weather in December 1999

Temperature for December 1999

In December 1999 the average high temperature in Great Falls, MT was 47.4°F, and this was 10.7°F warmer than the average of 36.7°F. The hottest day in December 1999 was 29 December when the temperature reached 57.9°F. Overnight the average temperature in December is 16.8°F and in 1999 the average overnight temperature was 8.0°F warmer at 24.7°F.

Precipitation for December 1999

In December the average monthly rainfall in Great Falls, MT is 0.73 inches with rain usually falling on 1 days. In December 1999 there was a total of 0.03 inches of rain, that fell on 2 days.