December weather in Duncan, SC
The average temperature in Duncan in December is 44.8°F (34.8°F–54.9°F). Average precipitation: 4.58 inches. Average snowfall is 0.6 inches.
December is a winter month in Duncan, and is cooler than the annual average of 61.3°F. Daily temperatures swing about 20.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 40m. For travel, December is cool.
Avg High
54.9°F
Avg Low
34.8°F
Precipitation
4.58 in
Snow
0.6 in
December records in Duncan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.0°F (1998) | 19.9°F (1964) | 2.24 in (1996) |
| December 2 | 75.0°F (1970) | 23.0°F (1979) | 3.11 in (2009) |
| December 3 | 79.0°F (2021) | 18.0°F (1979) | 2.00 in (1983) |
| December 4 | 75.0°F (2021) | 19.0°F (2000) | 1.05 in (1994) |
| December 5 | 73.0°F (1998) | 16.0°F (1969) | 1.11 in (1973) |
| December 6 | 75.9°F (1998) | 19.0°F (1992) | 2.02 in (1983) |
| December 7 | 73.9°F (1994) | 16.0°F (2010) | 1.36 in (1969) |
| December 8 | 73.9°F (1998) | 18.0°F (2006) | 1.40 in (1989) |
| December 9 | 73.0°F (2007) | 18.0°F (1968) | 3.29 in (2004) |
| December 10 | 79.0°F (2007) | 18.0°F (1974) | 2.39 in (2024) |
| December 11 | 79.0°F (2007) | 16.0°F (1962) | 1.90 in (1967) |
| December 12 | 78.1°F (2007) | 9.0°F (1962) | 1.01 in (1989) |
| December 13 | 75.0°F (2007) | 6.1°F (1962) | 1.21 in (2019) |
| December 14 | 71.1°F (1967) | 10.9°F (2010) | 1.51 in (1981) |
| December 15 | 73.9°F (2015) | 14.0°F (2025) | 2.68 in (1972) |
| December 16 | 72.0°F (1971) | 18.0°F (1963) | 1.86 in (1992) |
| December 17 | 71.1°F (1984) | 19.0°F (1963) | 1.69 in (2015) |
| December 18 | 75.9°F (1984) | 16.0°F (1972) | 1.42 in (2009) |
| December 19 | 73.9°F (2006) | 10.9°F (1975) | 0.50 in (1995) |
| December 20 | 72.0°F (1978) | 12.9°F (1981) | 1.47 in (2017) |
| December 21 | 66.9°F (1998) | 16.0°F (1981) | 1.71 in (1972) |
| December 22 | 70.0°F (1970) | 12.0°F (1973) | 2.09 in (1994) |
| December 23 | 70.0°F (1970) | 10.0°F (1989) | 2.76 in (2019) |
| December 24 | 75.0°F (2025) | 7.2°F (2022) | 1.74 in (2014) |
| December 25 | 75.9°F (2025) | 6.1°F (1983) | 1.67 in (2006) |
| December 26 | 75.9°F (2015) | 5.0°F (1985) | 2.34 in (2012) |
| December 27 | 75.0°F (1971) | 14.0°F (1970) | 1.29 in (2011) |
| December 28 | 75.0°F (1971) | 19.9°F (1977) | 1.76 in (1967) |
| December 29 | 72.0°F (1984) | 19.0°F (1977) | 1.16 in (2016) |
| December 30 | 75.0°F (1984) | 16.0°F (1983) | 2.07 in (2015) |
| December 31 | 72.0°F (1996) | 10.9°F (1983) | 2.24 in (1981) |