December weather in Hartman, CO
The average temperature in Hartman in December is 30.7°F (15.2°F–46.2°F). Average precipitation: 0.52 inches. Average snowfall is 2.9 inches.
December is a winter month in Hartman, and is cooler than the annual average of 53.3°F. Daily temperatures swing about 31°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 9h 22m. For travel, December is cool.
Avg High
46.2°F
Avg Low
15.2°F
Precipitation
0.52 in
Snow
2.9 in
December records in Hartman
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 77.0°F (1917) | 1.0°F (1974) | 0.85 in (1933) |
| December 2 | 75.0°F (1926) | 1.9°F (1929) | 1.00 in (1921) |
| December 3 | 75.0°F (2021) | 7.0°F (1978) | 0.82 in (1953) |
| December 4 | 75.0°F (1954) | -13.0°F (1955) | 1.10 in (1913) |
| December 5 | 75.9°F (1979) | -8.0°F (1955) | 0.41 in (1942) |
| December 6 | 81.0°F (1923) | -9.9°F (1972) | 0.30 in (1913) |
| December 7 | 75.0°F (1906) | -6.0°F (1972) | 0.47 in (1980) |
| December 8 | 73.9°F (1906) | -14.1°F (2005) | 0.50 in (1926) |
| December 9 | 72.0°F (1970) | -16.1°F (1978) | 0.50 in (1923) |
| December 10 | 75.0°F (1915) | -13.0°F (1972) | 0.20 in (1941) |
| December 11 | 75.9°F (1984) | -18.9°F (1932) | 0.20 in (1940) |
| December 12 | 73.9°F (2025) | -23.1°F (1932) | 0.38 in (2007) |
| December 13 | 78.1°F (1948) | -18.0°F (1961) | 0.90 in (1899) |
| December 14 | 70.0°F (1929) | -9.9°F (1901) | 0.73 in (2023) |
| December 15 | 75.0°F (2021) | -14.1°F (1926) | 0.74 in (2014) |
| December 16 | 71.1°F (2025) | -8.0°F (1972) | 0.10 in (1932) |
| December 17 | 70.0°F (1939) | -23.1°F (2016) | 0.30 in (2016) |
| December 18 | 73.9°F (1980) | -23.1°F (2016) | 0.80 in (1895) |
| December 19 | 75.0°F (1917) | -17.0°F (1924) | 0.41 in (1911) |
| December 20 | 70.0°F (1903) | -9.9°F (1924) | 1.25 in (2006) |
| December 21 | 75.0°F (1981) | -13.0°F (1914) | 0.25 in (1963) |
| December 22 | 72.0°F (1933) | -22.0°F (1989) | 0.50 in (1907) |
| December 23 | 75.9°F (2025) | -16.1°F (1924) | 1.10 in (1939) |
| December 24 | 80.1°F (1955) | -16.1°F (1924) | 0.47 in (1997) |
| December 25 | 75.9°F (2025) | -13.0°F (2004) | 0.50 in (1939) |
| December 26 | 79.0°F (2025) | -9.9°F (1962) | 0.52 in (1942) |
| December 27 | 75.0°F (1980) | -13.0°F (1911) | 1.15 in (2018) |
| December 28 | 75.0°F (2025) | -9.9°F (1915) | 0.84 in (1979) |
| December 29 | 72.0°F (1984) | -17.0°F (1983) | 0.14 in (1983) |
| December 30 | 73.0°F (1951) | -18.0°F (1983) | 0.47 in (1896) |
| December 31 | 71.1°F (1965) | -14.1°F (1900) | 0.40 in (1924) |