December weather in Mount Morris, NY
The average temperature in Mount Morris in December is 30.0°F (23.2°F–36.7°F). Average precipitation: 2.10 inches.
December is a winter month in Mount Morris, and is cooler than the annual average of 47.7°F. Daily temperatures swing about 13.5°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 8h 52m. For travel, December is cold.
Avg High
36.7°F
Avg Low
23.2°F
Precipitation
2.10 in
Daylight
8h 52m
December records in Mount Morris
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 68.0°F (1991) | 7.0°F (1976) | 1.30 in (2010) |
| December 2 | 66.0°F (1977) | 3.9°F (1989) | 0.75 in (2010) |
| December 3 | 66.9°F (1896) | 0.0°F (1976) | 0.86 in (1991) |
| December 4 | 72.0°F (1982) | -2.0°F (1966) | 0.65 in (1990) |
| December 5 | 69.1°F (2012) | -2.9°F (1893) | 1.00 in (1898) |
| December 6 | 70.0°F (1896) | 1.9°F (2025) | 1.16 in (1977) |
| December 7 | 68.0°F (1896) | 7.0°F (1964) | 0.88 in (1962) |
| December 8 | 68.0°F (1896) | 1.9°F (2025) | 0.60 in (2021) |
| December 9 | 68.0°F (1966) | -0.9°F (1893) | 0.50 in (1896) |
| December 10 | 75.0°F (1896) | -4.0°F (1893) | 1.25 in (1975) |
| December 11 | 70.0°F (1896) | -2.0°F (1960) | 1.30 in (1969) |
| December 12 | 70.0°F (1896) | -9.9°F (1988) | 0.62 in (2007) |
| December 13 | 78.1°F (1896) | -9.0°F (1988) | 0.84 in (1959) |
| December 14 | 68.0°F (1896) | -8.0°F (2005) | 0.80 in (1983) |
| December 15 | 70.0°F (2015) | -0.9°F (1989) | 1.10 in (1999) |
| December 16 | 66.9°F (1896) | -2.9°F (1961) | 1.50 in (2002) |
| December 17 | 64.9°F (1896) | -2.9°F (1961) | 1.12 in (2001) |
| December 18 | 78.1°F (1896) | 1.9°F (2002) | 0.61 in (2001) |
| December 19 | 68.0°F (1896) | -0.9°F (1973) | 1.31 in (1977) |
| December 20 | 70.0°F (1896) | -2.0°F (1951) | 0.46 in (2021) |
| December 21 | 68.0°F (1896) | -4.0°F (1955) | 1.20 in (1895) |
| December 22 | 66.9°F (1896) | -5.1°F (1894) | 0.51 in (1984) |
| December 23 | 66.9°F (1949) | -7.1°F (1959) | 0.63 in (1981) |
| December 24 | 66.9°F (1896) | -9.9°F (1960) | 0.44 in (2017) |
| December 25 | 66.0°F (1896) | -15.0°F (1980) | 1.60 in (1979) |
| December 26 | 66.0°F (1982) | -15.0°F (1980) | 0.95 in (1979) |
| December 27 | 66.0°F (1896) | -9.0°F (1993) | 0.45 in (2012) |
| December 28 | 68.0°F (1896) | -9.0°F (1894) | 0.80 in (1968) |
| December 29 | 70.0°F (1896) | -15.0°F (1899) | 0.68 in (1959) |
| December 30 | 75.0°F (1896) | -17.0°F (1899) | 0.99 in (2019) |
| December 31 | 70.0°F (1896) | -8.0°F (1962) | 0.95 in (1971) |