December weather in New Castle, CO
The average temperature in New Castle in December is 25.7°F (15.1°F–36.4°F). Average precipitation: 1.19 inches. Average snowfall is 10.8 inches.
December is a winter month in New Castle, and is cooler than the annual average of 47.6°F. Daily temperatures swing about 21.3°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 13m. For travel, December is cold.
Avg High
36.4°F
Avg Low
15.1°F
Precipitation
1.19 in
Snow
10.8 in
December records in New Castle
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.9°F (1999) | -6.0°F (2006) | 0.40 in (1934) |
| December 2 | 63.0°F (1949) | -5.1°F (1905) | 0.40 in (1982) |
| December 3 | 63.0°F (1949) | -2.9°F (2006) | 0.40 in (1985) |
| December 4 | 64.0°F (1949) | -2.0°F (2009) | 0.78 in (1954) |
| December 5 | 61.0°F (1939) | -6.0°F (1909) | 0.90 in (1951) |
| December 6 | 62.1°F (1939) | -11.0°F (1912) | 0.90 in (1966) |
| December 7 | 64.0°F (1939) | -13.0°F (1978) | 0.55 in (1995) |
| December 8 | 59.0°F (1933) | -11.9°F (2005) | 0.75 in (2009) |
| December 9 | 60.1°F (2016) | -15.0°F (1919) | 0.60 in (1893) |
| December 10 | 59.0°F (1929) | -9.9°F (1972) | 0.55 in (1969) |
| December 11 | 64.0°F (1939) | -11.0°F (1972) | 0.61 in (1965) |
| December 12 | 55.9°F (1921) | -7.1°F (1961) | 0.80 in (1984) |
| December 13 | 61.0°F (1921) | -11.0°F (1964) | 0.51 in (1975) |
| December 14 | 70.0°F (2016) | -11.9°F (1916) | 0.62 in (1973) |
| December 15 | 55.9°F (1929) | -11.9°F (1916) | 0.60 in (1933) |
| December 16 | 57.9°F (1939) | -11.0°F (1972) | 0.70 in (2021) |
| December 17 | 64.0°F (2016) | -9.9°F (1916) | 1.30 in (2016) |
| December 18 | 55.9°F (1980) | -22.0°F (1909) | 1.10 in (1977) |
| December 19 | 55.0°F (1980) | -17.0°F (1909) | 0.68 in (1951) |
| December 20 | 52.0°F (1941) | -15.0°F (1949) | 0.60 in (1932) |
| December 21 | 54.0°F (1941) | -13.0°F (1908) | 0.47 in (2010) |
| December 22 | 54.0°F (1936) | -20.0°F (1990) | 0.50 in (1959) |
| December 23 | 51.1°F (1893) | -20.0°F (1990) | 0.35 in (1973) |
| December 24 | 52.0°F (1955) | -20.0°F (1990) | 1.12 in (2021) |
| December 25 | 52.0°F (1955) | -18.9°F (1909) | 0.70 in (1983) |
| December 26 | 55.0°F (1980) | -14.1°F (1912) | 0.90 in (1931) |
| December 27 | 55.9°F (1965) | -22.0°F (1904) | 0.56 in (1915) |
| December 28 | 66.9°F (2016) | -20.9°F (1916) | 0.60 in (1927) |
| December 29 | 53.1°F (1933) | -16.1°F (1905) | 0.55 in (1922) |
| December 30 | 53.1°F (1955) | -16.1°F (1905) | 1.47 in (1951) |
| December 31 | 55.0°F (1980) | -15.0°F (1967) | 1.03 in (1965) |