December weather in Lamar, CO
The average temperature in Lamar in December is 30.0°F (14.4°F–45.5°F). Average precipitation: 0.46 inches. Average snowfall is 5.9 inches.
December is a winter month in Lamar, and is cooler than the annual average of 53.1°F. Daily temperatures swing about 31.1°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
45.5°F
Avg Low
14.4°F
Precipitation
0.46 in
Snow
5.9 in
December records in Lamar
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.9°F (1995) | 3.0°F (1985) | 0.30 in (1913) |
| December 2 | 75.9°F (1998) | -9.0°F (1991) | 0.80 in (1913) |
| December 3 | 73.0°F (1926) | -4.0°F (1955) | 1.70 in (1921) |
| December 4 | 79.0°F (1965) | -11.9°F (1955) | 0.40 in (1904) |
| December 5 | 73.0°F (2007) | -9.9°F (1955) | 0.52 in (1893) |
| December 6 | 77.0°F (1901) | -11.0°F (1972) | 0.21 in (1978) |
| December 7 | 78.1°F (1923) | -9.9°F (2011) | 0.38 in (1926) |
| December 8 | 73.0°F (1970) | -15.0°F (2005) | 0.65 in (1926) |
| December 9 | 73.9°F (1902) | -17.0°F (1919) | 0.29 in (1943) |
| December 10 | 72.0°F (1996) | -17.0°F (1919) | 0.28 in (1960) |
| December 11 | 73.0°F (1939) | -17.0°F (1932) | 0.15 in (1972) |
| December 12 | 75.9°F (2025) | -23.1°F (1932) | 0.39 in (1991) |
| December 13 | 75.0°F (1948) | -17.0°F (1961) | 0.66 in (1899) |
| December 14 | 70.0°F (1995) | -13.0°F (1901) | 0.85 in (1965) |
| December 15 | 69.1°F (2021) | -16.1°F (1899) | 0.16 in (1988) |
| December 16 | 72.0°F (1962) | -5.1°F (1987) | 0.10 in (1932) |
| December 17 | 73.0°F (1939) | -4.0°F (1965) | 0.41 in (1965) |
| December 18 | 70.0°F (2025) | -20.9°F (2016) | 0.73 in (1898) |
| December 19 | 68.0°F (1978) | -20.9°F (2016) | 0.70 in (1911) |
| December 20 | 73.0°F (1981) | -20.9°F (1924) | 1.13 in (2011) |
| December 21 | 70.0°F (1901) | -14.1°F (1924) | 0.72 in (1920) |
| December 22 | 73.0°F (1933) | -23.1°F (1989) | 0.38 in (1981) |
| December 23 | 79.0°F (1901) | -16.1°F (1989) | 0.32 in (1939) |
| December 24 | 82.0°F (1955) | -15.0°F (1924) | 0.42 in (1973) |
| December 25 | 78.1°F (2025) | -9.9°F (1924) | 0.50 in (1939) |
| December 26 | 79.0°F (2025) | -9.0°F (1911) | 0.38 in (1987) |
| December 27 | 75.0°F (1980) | -15.0°F (1911) | 0.43 in (1979) |
| December 28 | 71.1°F (1984) | -17.0°F (1915) | 0.72 in (1979) |
| December 29 | 70.0°F (1999) | -17.0°F (1983) | 0.60 in (2006) |
| December 30 | 70.0°F (1951) | -20.9°F (1990) | 1.00 in (2006) |
| December 31 | 66.9°F (1996) | -16.1°F (1990) | 1.22 in (2006) |