Thermopolis December Weather

Averages and records for weather in Thermopolis, Wyoming in the month of December.
Typical Thermopolis December Weather
1991–2020
Average daily high 37.5 °F
Average daily low 12.3 °F
Average monthly precipitation 0.4 inches
Average monthly snow 5.6 inches
Daily chance of precipitation 10.0%
Daily chance of snow 7.5%
Thermopolis December Weather Records
1899–2024
Highest temperature 78 °F December 10, 1939
Lowest temperature -38 °F December 19, 1924
Highest daily low 50 °F December 13, 2014
Lowest daily high -16 °F December 21, 1990
Hottest average high temperature 50.1 °F 1939
Coldest average high temperature 21.1 °F 1909
Most daily precipitation 1.1 inches December 19, 1925
Most monthly precipitation 1.8 inches 1925
Most daily snow 11.0 inches December 15, 2015
Most monthly snow 23.0 inches 2014
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
December 1 42.0 16.7 67 -8
December 2 41.4 16.3 67 -8
December 3 40.9 15.9 62 -9
December 4 40.5 15.6 60 -24
December 5 40.1 15.2 70 -30
December 6 39.7 14.8 72 -16
December 7 39.5 14.5 59 -26
December 8 39.2 14.4 68 -20
December 9 38.8 14.1 65 -24
December 10 38.6 13.8 78 -25
December 11 38.3 13.5 65 -31
December 12 38.1 13.2 60 -20
December 13 37.9 13.0 60 -26
December 14 37.8 12.7 59 -31
December 15 37.6 12.5 58 -26
December 16 37.4 12.2 61 -22
December 17 37.1 11.9 65 -25
December 18 36.8 11.7 54 -38
December 19 36.7 11.5 56 -38
December 20 36.7 11.5 58 -30
December 21 36.7 11.4 58 -35
December 22 36.5 11.2 61 -35
December 23 36.4 11.0 65 -29
December 24 36.3 10.9 59 -27
December 25 36.2 10.9 57 -20
December 26 36.2 10.8 56 -15
December 27 36.1 10.8 57 -26
December 28 36.0 10.6 56 -29
December 29 35.8 10.4 56 -25
December 30 35.8 10.2 62 -33
December 31 35.8 10.3 58 -34
Weather Station Details
Years Station Coordinates
1899–2024 Thermopolis location