December weather in Castle Pines, CO
The average temperature in Castle Pines in December is 31.8°F (18.0°F–45.7°F). Average precipitation: 0.69 inches. Average snowfall is 8.9 inches.
December is a winter month in Castle Pines, and is cooler than the annual average of 49.5°F. Daily temperatures swing about 27.7°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 9h 14m. For travel, December is cool.
Avg High
45.7°F
Avg Low
18.0°F
Precipitation
0.69 in
Snow
8.9 in
December records in Castle Pines
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 69.1°F (1917) | -5.1°F (2004) | 0.43 in (1913) |
| December 2 | 75.9°F (2021) | -13.0°F (1908) | 0.60 in (1921) |
| December 3 | 82.0°F (2021) | -8.0°F (1899) | 0.62 in (1973) |
| December 4 | 68.0°F (1989) | -9.0°F (1909) | 2.00 in (1913) |
| December 5 | 73.9°F (2021) | -15.0°F (2013) | 0.86 in (1913) |
| December 6 | 69.1°F (2021) | -26.0°F (1972) | 0.62 in (1913) |
| December 7 | 71.1°F (2023) | -25.1°F (1927) | 0.39 in (2016) |
| December 8 | 72.0°F (2020) | -23.1°F (1978) | 0.64 in (1986) |
| December 9 | 72.0°F (2020) | -16.1°F (1898) | 0.51 in (2003) |
| December 10 | 71.1°F (2020) | -25.1°F (1972) | 1.47 in (1923) |
| December 11 | 66.9°F (1990) | -18.9°F (1916) | 0.29 in (1910) |
| December 12 | 68.0°F (2004) | -9.9°F (1985) | 0.37 in (1907) |
| December 13 | 72.0°F (1921) | -22.0°F (1926) | 0.50 in (1993) |
| December 14 | 71.1°F (2021) | -17.0°F (1901) | 0.60 in (1902) |
| December 15 | 70.0°F (2021) | -11.9°F (1897) | 0.52 in (2015) |
| December 16 | 68.0°F (2016) | -11.0°F (1972) | 0.26 in (1915) |
| December 17 | 66.9°F (1982) | -15.0°F (1996) | 0.37 in (1996) |
| December 18 | 66.9°F (1998) | -26.0°F (1909) | 0.78 in (1909) |
| December 19 | 68.0°F (1917) | -27.9°F (1909) | 0.52 in (1913) |
| December 20 | 66.0°F (2021) | -27.0°F (1924) | 0.40 in (1914) |
| December 21 | 68.0°F (2024) | -24.0°F (1990) | 0.85 in (1910) |
| December 22 | 69.1°F (2024) | -24.0°F (1983) | 1.00 in (1981) |
| December 23 | 72.0°F (2019) | -27.0°F (1924) | 1.05 in (1979) |
| December 24 | 70.0°F (2021) | -16.1°F (1926) | 0.30 in (1894) |
| December 25 | 66.0°F (1971) | -16.1°F (1983) | 0.80 in (1973) |
| December 26 | 66.0°F (1971) | -20.0°F (1912) | 0.34 in (1922) |
| December 27 | 64.9°F (1897) | -17.0°F (1911) | 0.84 in (1987) |
| December 28 | 63.0°F (1984) | -14.1°F (1900) | 0.59 in (1987) |
| December 29 | 64.0°F (1965) | -16.1°F (1898) | 0.93 in (2022) |
| December 30 | 64.9°F (1917) | -18.0°F (1898) | 0.24 in (1973) |
| December 31 | 63.0°F (2017) | -29.0°F (1900) | 0.25 in (1896) |