December weather in Oswego, NY
The average temperature in Oswego in December is 31.3°F (26.0°F–36.7°F). Average precipitation: 3.89 inches. Average snowfall is 30.6 inches.
December is a winter month in Oswego, and is cooler than the annual average of 48.7°F. Daily temperatures swing about 10.7°F between overnight low and afternoon high. Expect about 19 days with precipitation. Daylight averages about 8h 47m. For travel, December is cold.
Avg High
36.7°F
Avg Low
26.0°F
Precipitation
3.89 in
Snow
30.6 in
December records in Oswego
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.9°F (1934) | 0.0°F (1936) | 2.52 in (2010) |
| December 2 | 62.1°F (1982) | 7.0°F (1930) | 1.20 in (1963) |
| December 3 | 63.0°F (1982) | 0.0°F (1940) | 0.94 in (1939) |
| December 4 | 68.0°F (2012) | 1.0°F (1940) | 1.06 in (1950) |
| December 5 | 64.9°F (1999) | 1.0°F (1926) | 0.92 in (1994) |
| December 6 | 68.0°F (2001) | 7.0°F (1935) | 0.84 in (1984) |
| December 7 | 69.1°F (1998) | 6.1°F (1926) | 1.20 in (1976) |
| December 8 | 63.0°F (1966) | 1.9°F (2008) | 2.50 in (1958) |
| December 9 | 62.1°F (1946) | 3.9°F (1989) | 1.20 in (1958) |
| December 10 | 57.0°F (1946) | 3.0°F (1982) | 1.00 in (1953) |
| December 11 | 62.1°F (1979) | -0.9°F (1977) | 1.64 in (1952) |
| December 12 | 59.0°F (1979) | -11.9°F (1988) | 0.97 in (1995) |
| December 13 | 57.0°F (1927) | -0.9°F (1982) | 0.90 in (1996) |
| December 14 | 62.1°F (2015) | -2.0°F (2005) | 1.26 in (1977) |
| December 15 | 59.0°F (1975) | 0.0°F (1943) | 0.95 in (1954) |
| December 16 | 64.9°F (2021) | 0.0°F (1932) | 1.12 in (2005) |
| December 17 | 64.0°F (2021) | -0.9°F (1932) | 0.90 in (1970) |
| December 18 | 52.0°F (2025) | 3.0°F (2009) | 1.18 in (2023) |
| December 19 | 59.0°F (1957) | -13.0°F (1942) | 1.02 in (1935) |
| December 20 | 63.0°F (1957) | -20.0°F (1942) | 0.86 in (1939) |
| December 21 | 57.9°F (2018) | -8.0°F (1942) | 0.92 in (2018) |
| December 22 | 64.9°F (1949) | 0.0°F (1955) | 0.91 in (2018) |
| December 23 | 62.1°F (1957) | -6.0°F (1943) | 0.77 in (2022) |
| December 24 | 66.0°F (2015) | -5.1°F (1989) | 1.46 in (1941) |
| December 25 | 64.9°F (1932) | -16.1°F (1980) | 2.00 in (1978) |
| December 26 | 61.0°F (1982) | -8.0°F (1980) | 0.89 in (1969) |
| December 27 | 59.0°F (1936) | -9.9°F (1989) | 1.26 in (2017) |
| December 28 | 59.0°F (1982) | -4.0°F (1933) | 0.67 in (1940) |
| December 29 | 63.0°F (1984) | -23.1°F (1933) | 1.25 in (1968) |
| December 30 | 62.1°F (2024) | -16.1°F (1933) | 1.96 in (1942) |
| December 31 | 62.1°F (1965) | -2.9°F (1962) | 0.81 in (2014) |