December weather in Grand Lake, CO
The average temperature in Grand Lake in December is 17.5°F (5.1°F–30.0°F). Average precipitation: 1.50 inches. Average snowfall is 28.5 inches.
December is a winter month in Grand Lake, and is cooler than the annual average of 36.9°F. Daily temperatures swing about 24.9°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 9h 9m. For travel, December is cold.
Avg High
30.0°F
Avg Low
5.1°F
Precipitation
1.50 in
Snow
28.5 in
December records in Grand Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 54.0°F (1998) | -16.1°F (2004) | 0.72 in (1978) |
| December 2 | 52.0°F (1998) | -15.0°F (1979) | 0.64 in (1909) |
| December 3 | 54.0°F (1998) | -17.0°F (2006) | 0.90 in (2023) |
| December 4 | 54.0°F (1987) | -17.0°F (2006) | 0.85 in (2013) |
| December 5 | 50.0°F (1965) | -23.1°F (2013) | 1.50 in (1913) |
| December 6 | 51.1°F (1939) | -26.0°F (1950) | 1.00 in (1966) |
| December 7 | 51.1°F (1939) | -22.0°F (2005) | 0.75 in (2007) |
| December 8 | 50.0°F (1981) | -32.1°F (1978) | 0.38 in (1952) |
| December 9 | 55.0°F (1939) | -29.0°F (1956) | 0.55 in (1909) |
| December 10 | 54.0°F (1939) | -24.0°F (1966) | 0.75 in (1910) |
| December 11 | 46.9°F (1950) | -23.1°F (1972) | 0.57 in (1958) |
| December 12 | 46.9°F (1939) | -16.1°F (1957) | 0.68 in (1958) |
| December 13 | 46.9°F (1962) | -25.1°F (1964) | 0.46 in (1971) |
| December 14 | 46.9°F (1998) | -15.0°F (1964) | 0.47 in (2019) |
| December 15 | 48.9°F (1962) | -29.0°F (1972) | 0.66 in (1989) |
| December 16 | 51.1°F (1962) | -22.0°F (1940) | 0.60 in (2016) |
| December 17 | 51.1°F (1939) | -17.0°F (1947) | 0.55 in (2016) |
| December 18 | 46.9°F (1994) | -27.0°F (1964) | 0.45 in (1992) |
| December 19 | 48.0°F (2025) | -18.9°F (2016) | 0.43 in (2010) |
| December 20 | 45.0°F (2003) | -22.0°F (1992) | 0.62 in (2006) |
| December 21 | 48.9°F (2025) | -20.0°F (1977) | 0.57 in (1996) |
| December 22 | 50.0°F (2025) | -25.1°F (1998) | 0.67 in (1907) |
| December 23 | 51.1°F (2025) | -35.0°F (1990) | 1.00 in (1915) |
| December 24 | 53.1°F (2025) | -32.1°F (1990) | 0.80 in (2021) |
| December 25 | 46.9°F (2025) | -29.9°F (1948) | 0.75 in (1983) |
| December 26 | 46.9°F (2005) | -27.9°F (1962) | 0.80 in (1915) |
| December 27 | 52.0°F (1980) | -22.0°F (1942) | 0.32 in (1964) |
| December 28 | 43.0°F (1965) | -29.0°F (1954) | 0.65 in (1973) |
| December 29 | 46.9°F (1965) | -27.0°F (1954) | 0.68 in (1969) |
| December 30 | 46.0°F (2017) | -24.0°F (1958) | 0.87 in (1951) |
| December 31 | 48.0°F (1955) | -23.1°F (1972) | 0.50 in (2022) |