December weather in Sumter, SC
The average temperature in Sumter in December is 46.2°F (35.0°F–57.4°F). Average precipitation: 3.83 inches.
December is a winter month in Sumter, and is cooler than the annual average of 62.1°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 45m. For travel, December is cool.
Avg High
57.4°F
Avg Low
35.0°F
Precipitation
3.83 in
Daylight
9h 45m
December records in Sumter
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 80.1°F (1946) | 15.1°F (1929) | 1.43 in (1930) |
| December 2 | 79.0°F (1982) | 19.9°F (1964) | 2.08 in (1929) |
| December 3 | 80.1°F (1991) | 15.1°F (1960) | 2.00 in (1905) |
| December 4 | 81.0°F (2021) | 18.0°F (1960) | 2.61 in (1941) |
| December 5 | 77.0°F (1982) | 19.0°F (1935) | 1.12 in (2016) |
| December 6 | 82.0°F (1975) | 19.9°F (1935) | 1.39 in (1977) |
| December 7 | 82.0°F (1998) | 12.9°F (1937) | 1.12 in (1983) |
| December 8 | 82.0°F (1998) | 15.1°F (2010) | 1.39 in (2018) |
| December 9 | 82.9°F (1998) | 14.0°F (2010) | 2.01 in (2017) |
| December 10 | 80.1°F (1943) | 17.1°F (2006) | 0.89 in (1947) |
| December 11 | 79.0°F (2007) | 19.9°F (1937) | 1.05 in (1932) |
| December 12 | 79.0°F (1946) | 9.0°F (1958) | 2.06 in (1983) |
| December 13 | 79.0°F (1931) | 8.1°F (1962) | 2.10 in (2019) |
| December 14 | 78.1°F (2007) | 8.1°F (1962) | 1.61 in (1953) |
| December 15 | 79.0°F (1971) | 16.0°F (1962) | 1.56 in (1977) |
| December 16 | 81.0°F (1971) | 12.0°F (1943) | 2.57 in (1998) |
| December 17 | 79.0°F (1933) | 10.0°F (1901) | 2.25 in (1970) |
| December 18 | 75.0°F (1933) | 15.1°F (1943) | 2.27 in (2023) |
| December 19 | 79.0°F (1967) | 15.1°F (1975) | 1.95 in (2009) |
| December 20 | 84.0°F (1931) | 17.1°F (1981) | 1.15 in (1946) |
| December 21 | 78.1°F (1967) | 12.9°F (1935) | 1.43 in (2017) |
| December 22 | 75.9°F (1967) | 12.9°F (1985) | 1.50 in (1972) |
| December 23 | 79.0°F (1967) | 15.1°F (1935) | 2.74 in (1941) |
| December 24 | 79.0°F (1990) | 12.0°F (1906) | 2.62 in (1941) |
| December 25 | 80.1°F (1901) | 9.0°F (1983) | 1.40 in (1945) |
| December 26 | 79.0°F (2015) | 9.0°F (1983) | 2.86 in (1943) |
| December 27 | 79.0°F (1901) | 12.9°F (1935) | 1.20 in (1964) |
| December 28 | 78.1°F (1946) | 18.0°F (1935) | 3.87 in (1992) |
| December 29 | 79.0°F (2015) | 19.0°F (1977) | 1.08 in (1991) |
| December 30 | 82.0°F (2015) | 18.0°F (1961) | 1.40 in (2007) |
| December 31 | 80.1°F (1906) | 16.0°F (1983) | 1.22 in (1981) |