December weather in Lancaster, PA
The average temperature in Lancaster in December is 35.7°F (27.1°F–44.4°F). Average precipitation: 3.47 inches. Average snowfall is 3.4 inches.
December is a winter month in Lancaster, and is cooler than the annual average of 53.7°F. Daily temperatures swing about 17.3°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 10m. For travel, December is cold.
Avg High
44.4°F
Avg Low
27.1°F
Precipitation
3.47 in
Snow
3.4 in
December records in Lancaster
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.0°F (2006) | 14.0°F (1976) | 1.10 in (2010) |
| December 2 | 64.9°F (1998) | 19.0°F (2022) | 1.20 in (1991) |
| December 3 | 70.0°F (1998) | 9.0°F (1976) | 1.00 in (1990) |
| December 4 | 72.0°F (1982) | 12.9°F (1976) | 2.25 in (1950) |
| December 5 | 75.0°F (2001) | 10.9°F (1976) | 2.07 in (1993) |
| December 6 | 69.1°F (1998) | 12.0°F (2002) | 1.57 in (2013) |
| December 7 | 75.9°F (1998) | 1.9°F (2002) | 1.65 in (2011) |
| December 8 | 70.0°F (1980) | 10.0°F (2002) | 0.46 in (2001) |
| December 9 | 64.9°F (1980) | 6.1°F (1989) | 1.53 in (1978) |
| December 10 | 66.0°F (2023) | 3.9°F (1989) | 2.00 in (2023) |
| December 11 | 69.1°F (2021) | 12.0°F (1995) | 2.04 in (2008) |
| December 12 | 68.0°F (1979) | 6.1°F (1988) | 2.60 in (1983) |
| December 13 | 66.9°F (2015) | 5.0°F (1988) | 1.80 in (1983) |
| December 14 | 64.9°F (2015) | 1.9°F (2005) | 1.24 in (2000) |
| December 15 | 69.1°F (1980) | 9.0°F (2005) | 1.36 in (2022) |
| December 16 | 64.9°F (2021) | 9.0°F (2025) | 1.20 in (2007) |
| December 17 | 70.0°F (2011) | 10.9°F (1989) | 2.00 in (2000) |
| December 18 | 66.9°F (2006) | 8.1°F (1989) | 2.19 in (1977) |
| December 19 | 60.1°F (2025) | 3.0°F (1989) | 1.00 in (1995) |
| December 20 | 61.0°F (2018) | 5.0°F (1985) | 0.85 in (2018) |
| December 21 | 66.9°F (2018) | 6.1°F (1985) | 1.00 in (2012) |
| December 22 | 66.0°F (2013) | 3.9°F (1989) | 1.35 in (1983) |
| December 23 | 66.0°F (2015) | 0.0°F (2022) | 0.95 in (2004) |
| December 24 | 70.0°F (2015) | 0.0°F (1989) | 1.35 in (2020) |
| December 25 | 64.0°F (2020) | -2.9°F (1983) | 1.73 in (1986) |
| December 26 | 61.0°F (1982) | -2.9°F (1980) | 1.31 in (1949) |
| December 27 | 68.0°F (2015) | 1.9°F (1980) | 1.35 in (2023) |
| December 28 | 64.0°F (2008) | 10.9°F (2017) | 0.78 in (1983) |
| December 29 | 75.0°F (1984) | 10.9°F (2017) | 0.93 in (2013) |
| December 30 | 73.0°F (1984) | 5.0°F (1976) | 1.03 in (1948) |
| December 31 | 64.0°F (1992) | -0.9°F (2017) | 0.96 in (1989) |