December weather in Green River, WY
The average temperature in Green River in December is 20.9°F (9.8°F–32.0°F). Average precipitation: 0.63 inches. Average snowfall is 6.7 inches.
December is a winter month in Green River, and is cooler than the annual average of 44.1°F. Daily temperatures swing about 22.2°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 9h 0m. For travel, December is cold.
Avg High
32.0°F
Avg Low
9.8°F
Precipitation
0.63 in
Snow
6.7 in
December records in Green River
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.9°F (1998) | -17.0°F (1979) | 0.16 in (1967) |
| December 2 | 57.9°F (1926) | -15.0°F (1979) | 0.20 in (2007) |
| December 3 | 60.1°F (1998) | -18.0°F (1945) | 0.25 in (2013) |
| December 4 | 57.9°F (1980) | -20.9°F (1909) | 0.60 in (2013) |
| December 5 | 62.1°F (1939) | -18.9°F (1984) | 0.30 in (1906) |
| December 6 | 59.0°F (1975) | -18.9°F (1928) | 0.50 in (1956) |
| December 7 | 60.1°F (1939) | -20.0°F (1928) | 0.20 in (2001) |
| December 8 | 57.9°F (1939) | -23.1°F (1928) | 0.24 in (1946) |
| December 9 | 62.1°F (1940) | -23.1°F (1978) | 0.32 in (1985) |
| December 10 | 60.1°F (1939) | -35.0°F (1972) | 0.30 in (2021) |
| December 11 | 66.0°F (1939) | -31.0°F (1972) | 0.57 in (1949) |
| December 12 | 59.0°F (1933) | -29.0°F (1932) | 0.15 in (1937) |
| December 13 | 57.0°F (1929) | -29.0°F (1932) | 0.38 in (1975) |
| December 14 | 57.0°F (1929) | -23.1°F (1972) | 0.35 in (1925) |
| December 15 | 57.0°F (1929) | -29.0°F (1972) | 0.40 in (2015) |
| December 16 | 61.0°F (1929) | -23.1°F (1932) | 0.16 in (1913) |
| December 17 | 62.1°F (1939) | -22.0°F (1928) | 0.40 in (1936) |
| December 18 | 57.9°F (1980) | -32.1°F (1909) | 0.11 in (2005) |
| December 19 | 54.0°F (1980) | -25.1°F (1907) | 0.18 in (1949) |
| December 20 | 57.9°F (1917) | -24.0°F (1924) | 0.80 in (1981) |
| December 21 | 54.0°F (2017) | -27.9°F (1990) | 0.20 in (2017) |
| December 22 | 57.0°F (1969) | -36.0°F (1990) | 0.30 in (2011) |
| December 23 | 61.0°F (2025) | -35.0°F (1983) | 0.50 in (1987) |
| December 24 | 57.9°F (2025) | -27.0°F (1909) | 0.50 in (1964) |
| December 25 | 55.9°F (2025) | -25.1°F (1987) | 0.50 in (2012) |
| December 26 | 57.0°F (2025) | -22.0°F (1952) | 0.60 in (2014) |
| December 27 | 55.0°F (1955) | -20.0°F (1948) | 0.60 in (1906) |
| December 28 | 53.1°F (1980) | -22.0°F (1954) | 0.25 in (2022) |
| December 29 | 50.0°F (1956) | -20.9°F (1913) | 0.28 in (1922) |
| December 30 | 55.0°F (1917) | -31.0°F (1978) | 0.32 in (1965) |
| December 31 | 55.9°F (1980) | -42.0°F (1978) | 0.40 in (2002) |