December weather in Bethlehem, PA
The average temperature in Bethlehem in December is 35.0°F (26.8°F–43.1°F). Average precipitation: 3.86 inches. Average snowfall is 4.6 inches.
December is a winter month in Bethlehem, and is cooler than the annual average of 53.1°F. Daily temperatures swing about 16.3°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 9h 6m. For travel, December is cold.
Avg High
43.1°F
Avg Low
26.8°F
Precipitation
3.86 in
Snow
4.6 in
December records in Bethlehem
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2006) | 7.0°F (1967) | 1.49 in (2010) |
| December 2 | 63.0°F (1970) | 1.9°F (1967) | 0.80 in (1986) |
| December 3 | 66.0°F (1998) | 8.1°F (1976) | 1.49 in (1990) |
| December 4 | 72.0°F (1998) | 8.1°F (1966) | 1.63 in (1950) |
| December 5 | 69.1°F (2001) | 12.0°F (2025) | 1.96 in (1993) |
| December 6 | 70.0°F (2001) | 9.0°F (2002) | 2.68 in (1953) |
| December 7 | 71.1°F (1998) | 5.0°F (2002) | 1.72 in (2011) |
| December 8 | 66.9°F (1980) | 10.9°F (2002) | 1.88 in (1974) |
| December 9 | 66.0°F (1980) | 7.0°F (1989) | 1.51 in (1973) |
| December 10 | 64.0°F (1966) | 1.0°F (1958) | 1.59 in (2023) |
| December 11 | 63.0°F (2021) | -2.0°F (1958) | 2.18 in (1952) |
| December 12 | 62.1°F (1979) | 1.9°F (1988) | 2.10 in (1983) |
| December 13 | 68.0°F (2015) | 5.0°F (1960) | 1.48 in (1996) |
| December 14 | 68.0°F (2015) | -2.0°F (2005) | 1.72 in (1956) |
| December 15 | 66.0°F (2015) | 6.1°F (1960) | 0.89 in (1948) |
| December 16 | 61.0°F (2021) | 1.0°F (1951) | 1.30 in (2005) |
| December 17 | 63.0°F (2000) | -2.0°F (1951) | 2.16 in (2000) |
| December 18 | 62.1°F (2006) | 8.1°F (1980) | 1.98 in (2023) |
| December 19 | 59.0°F (1957) | 0.0°F (1951) | 0.93 in (2008) |
| December 20 | 63.0°F (1957) | -2.0°F (1951) | 2.19 in (1957) |
| December 21 | 64.0°F (2018) | 3.0°F (1955) | 1.44 in (2012) |
| December 22 | 64.9°F (2013) | 1.0°F (1989) | 1.36 in (1983) |
| December 23 | 64.9°F (2015) | -2.9°F (1960) | 1.18 in (2004) |
| December 24 | 71.1°F (2015) | -5.1°F (1989) | 1.53 in (2020) |
| December 25 | 64.9°F (1964) | -2.0°F (1983) | 1.50 in (2002) |
| December 26 | 64.9°F (1964) | -2.9°F (1980) | 1.39 in (1975) |
| December 27 | 61.0°F (2016) | -0.9°F (1948) | 2.05 in (2023) |
| December 28 | 63.0°F (1982) | -8.0°F (1950) | 1.06 in (2018) |
| December 29 | 72.0°F (1984) | 5.0°F (1961) | 1.19 in (1948) |
| December 30 | 64.0°F (1984) | -0.9°F (1962) | 1.59 in (1948) |
| December 31 | 61.0°F (1965) | -6.0°F (1963) | 1.04 in (2018) |