December weather in Cortez, CO
The average temperature in Cortez in December is 30.4°F (17.7°F–43.2°F). Average precipitation: 0.89 inches. Average snowfall is 7.4 inches.
December is a winter month in Cortez, and is cooler than the annual average of 50.8°F. Daily temperatures swing about 25.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 26m. For travel, December is cold.
Avg High
43.2°F
Avg Low
17.7°F
Precipitation
0.89 in
Snow
7.4 in
December records in Cortez
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.9°F (1999) | -9.9°F (1975) | 0.95 in (2007) |
| December 2 | 64.0°F (2003) | -2.9°F (1931) | 0.61 in (1955) |
| December 3 | 64.0°F (2017) | 0.0°F (1934) | 0.48 in (1944) |
| December 4 | 62.1°F (1980) | -6.0°F (1931) | 0.83 in (1913) |
| December 5 | 62.1°F (1946) | -6.0°F (1931) | 0.70 in (1972) |
| December 6 | 63.0°F (1939) | -9.9°F (1931) | 0.55 in (1980) |
| December 7 | 61.0°F (1939) | -8.0°F (1951) | 0.67 in (1966) |
| December 8 | 61.0°F (1939) | -22.0°F (1978) | 0.68 in (2007) |
| December 9 | 60.1°F (1939) | -20.0°F (1978) | 0.48 in (2019) |
| December 10 | 63.0°F (1939) | -18.9°F (1978) | 1.02 in (2021) |
| December 11 | 63.0°F (1939) | -11.0°F (1978) | 1.17 in (1954) |
| December 12 | 61.0°F (2025) | -16.1°F (1961) | 0.37 in (1937) |
| December 13 | 60.1°F (1948) | -18.0°F (1931) | 0.65 in (1984) |
| December 14 | 60.1°F (1946) | -13.0°F (1931) | 0.69 in (1975) |
| December 15 | 61.0°F (1946) | -13.0°F (1940) | 0.33 in (1967) |
| December 16 | 57.0°F (2025) | -11.0°F (1931) | 0.52 in (2008) |
| December 17 | 62.1°F (1939) | -9.9°F (1931) | 0.71 in (2016) |
| December 18 | 60.1°F (2025) | -2.0°F (1933) | 0.85 in (1978) |
| December 19 | 59.0°F (1988) | -9.0°F (1945) | 1.15 in (1978) |
| December 20 | 64.0°F (2025) | -9.9°F (1992) | 0.64 in (1949) |
| December 21 | 60.1°F (1969) | -15.0°F (1951) | 0.38 in (1968) |
| December 22 | 62.1°F (2025) | -15.0°F (1968) | 0.50 in (1941) |
| December 23 | 66.9°F (2025) | -20.0°F (1990) | 0.98 in (1944) |
| December 24 | 64.9°F (2025) | -13.0°F (1990) | 0.60 in (1914) |
| December 25 | 62.1°F (2025) | -15.0°F (1990) | 0.58 in (1942) |
| December 26 | 62.1°F (1989) | -13.0°F (1932) | 0.64 in (2018) |
| December 27 | 57.9°F (2005) | -8.0°F (1962) | 0.50 in (1946) |
| December 28 | 59.0°F (1980) | -9.0°F (2003) | 0.79 in (2022) |
| December 29 | 57.0°F (2017) | -13.0°F (1966) | 0.36 in (1931) |
| December 30 | 61.0°F (2024) | -18.9°F (1990) | 1.05 in (1951) |
| December 31 | 62.1°F (2017) | -9.9°F (1931) | 0.51 in (1941) |