December weather in East Thermopolis, WY
The average temperature in East Thermopolis in December is 24.9°F (12.3°F–37.5°F). Average precipitation: 0.46 inches. Average snowfall is 4.5 inches.
December is a winter month in East Thermopolis, and is cooler than the annual average of 48.6°F. Daily temperatures swing about 25.2°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 8h 46m. For travel, December is cold.
Avg High
37.5°F
Avg Low
12.3°F
Precipitation
0.46 in
Snow
4.5 in
December records in East Thermopolis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 66.9°F (1995) | -8.0°F (1908) | 0.35 in (1912) |
| December 2 | 66.9°F (2021) | -8.0°F (1908) | 0.49 in (1997) |
| December 3 | 62.1°F (1958) | -9.0°F (1928) | 0.32 in (1924) |
| December 4 | 60.1°F (2007) | -24.0°F (1909) | 0.37 in (1941) |
| December 5 | 70.0°F (1939) | -29.9°F (1909) | 0.20 in (1956) |
| December 6 | 72.0°F (1939) | -16.1°F (1909) | 0.38 in (1924) |
| December 7 | 59.0°F (1939) | -26.0°F (1909) | 0.21 in (1923) |
| December 8 | 68.0°F (1940) | -20.0°F (1932) | 0.25 in (1926) |
| December 9 | 64.9°F (1939) | -24.0°F (2009) | 0.63 in (1997) |
| December 10 | 78.1°F (1939) | -25.1°F (1932) | 0.35 in (1909) |
| December 11 | 64.9°F (1939) | -31.0°F (1932) | 0.40 in (1901) |
| December 12 | 60.1°F (1939) | -20.0°F (1949) | 0.45 in (1926) |
| December 13 | 60.1°F (1933) | -26.0°F (1926) | 0.45 in (1937) |
| December 14 | 59.0°F (2021) | -31.0°F (1926) | 0.15 in (1909) |
| December 15 | 59.0°F (2025) | -26.0°F (1926) | 0.45 in (2015) |
| December 16 | 61.0°F (1962) | -22.0°F (1914) | 0.60 in (1901) |
| December 17 | 64.9°F (1939) | -25.1°F (1924) | 0.20 in (1995) |
| December 18 | 55.9°F (2024) | -38.0°F (1924) | 0.34 in (1911) |
| December 19 | 60.1°F (2025) | -38.0°F (1924) | 1.12 in (1925) |
| December 20 | 57.9°F (1957) | -29.9°F (1924) | 0.13 in (1925) |
| December 21 | 57.9°F (1994) | -35.0°F (1990) | 0.30 in (1956) |
| December 22 | 64.0°F (2025) | -35.0°F (1990) | 0.15 in (2014) |
| December 23 | 64.9°F (1933) | -29.0°F (2022) | 0.37 in (1921) |
| December 24 | 68.0°F (2025) | -27.0°F (1924) | 0.22 in (1997) |
| December 25 | 64.0°F (2025) | -20.0°F (1962) | 0.16 in (1941) |
| December 26 | 55.9°F (1959) | -15.0°F (1948) | 0.73 in (2003) |
| December 27 | 57.0°F (1955) | -26.0°F (1916) | 0.36 in (2003) |
| December 28 | 55.9°F (1999) | -29.0°F (1916) | 0.45 in (1955) |
| December 29 | 55.9°F (1999) | -25.1°F (1990) | 0.25 in (1915) |
| December 30 | 62.1°F (1933) | -33.0°F (1990) | 0.10 in (1918) |
| December 31 | 57.9°F (1996) | -34.1°F (1923) | 0.15 in (1950) |