December weather in Lebanon, PA
The average temperature in Lebanon in December is 34.3°F (26.9°F–41.7°F). Average precipitation: 3.57 inches. Average snowfall is 4.0 inches.
December is a winter month in Lebanon, and is cooler than the annual average of 52.3°F. Daily temperatures swing about 14.8°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 8m. For travel, December is cold.
Avg High
41.7°F
Avg Low
26.9°F
Precipitation
3.57 in
Snow
4.0 in
December records in Lebanon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2006) | -0.9°F (1967) | 1.34 in (2010) |
| December 2 | 62.1°F (1991) | 1.9°F (1967) | 0.87 in (1974) |
| December 3 | 69.1°F (1998) | 7.0°F (1976) | 1.86 in (1990) |
| December 4 | 73.0°F (1998) | 10.9°F (1966) | 3.18 in (1950) |
| December 5 | 73.0°F (2001) | 12.0°F (1966) | 2.25 in (1993) |
| December 6 | 70.0°F (1998) | 6.1°F (2002) | 1.18 in (2013) |
| December 7 | 70.0°F (1998) | 1.0°F (2002) | 1.51 in (1976) |
| December 8 | 68.0°F (1980) | 8.1°F (2002) | 1.50 in (1974) |
| December 9 | 68.0°F (1980) | 0.0°F (1989) | 1.40 in (1973) |
| December 10 | 64.9°F (1980) | 3.9°F (1989) | 1.05 in (2023) |
| December 11 | 66.9°F (1966) | 5.0°F (1968) | 2.56 in (2008) |
| December 12 | 66.0°F (1979) | 3.0°F (1988) | 1.05 in (1983) |
| December 13 | 66.0°F (2015) | 1.9°F (2005) | 1.78 in (1983) |
| December 14 | 64.9°F (2015) | -2.0°F (2005) | 1.16 in (1999) |
| December 15 | 62.1°F (2008) | 6.1°F (2005) | 1.33 in (2022) |
| December 16 | 63.0°F (2021) | 8.1°F (2025) | 1.12 in (1982) |
| December 17 | 63.0°F (1971) | 7.0°F (1989) | 1.53 in (2023) |
| December 18 | 64.0°F (2006) | 3.0°F (1989) | 1.46 in (2023) |
| December 19 | 57.9°F (2025) | 3.0°F (1989) | 1.02 in (2008) |
| December 20 | 55.9°F (2002) | 3.9°F (2004) | 0.95 in (2012) |
| December 21 | 62.1°F (2018) | 3.9°F (1989) | 1.24 in (1977) |
| December 22 | 63.0°F (2013) | 1.9°F (1989) | 1.25 in (1983) |
| December 23 | 63.0°F (1990) | 1.0°F (1989) | 1.50 in (2015) |
| December 24 | 69.1°F (2015) | 0.0°F (1989) | 1.91 in (2020) |
| December 25 | 60.1°F (2020) | -2.0°F (1980) | 1.60 in (1986) |
| December 26 | 57.9°F (1982) | -0.9°F (1980) | 1.42 in (1975) |
| December 27 | 60.1°F (2016) | 1.0°F (1989) | 1.23 in (2011) |
| December 28 | 62.1°F (2008) | 3.9°F (1977) | 1.30 in (1990) |
| December 29 | 73.9°F (1984) | 7.0°F (1993) | 1.02 in (1983) |
| December 30 | 75.0°F (1984) | -2.0°F (1976) | 1.16 in (1948) |
| December 31 | 60.1°F (1972) | -4.0°F (2017) | 1.02 in (1972) |