December weather in Washington, PA
The average temperature in Washington in December is 33.7°F (25.9°F–41.4°F). Average precipitation: 3.32 inches. Average snowfall is 6.0 inches.
December is a winter month in Washington, and is cooler than the annual average of 51.5°F. Daily temperatures swing about 15.5°F between overnight low and afternoon high. Expect about 15 days with precipitation. Daylight averages about 9h 9m. For travel, December is cold.
Avg High
41.4°F
Avg Low
25.9°F
Precipitation
3.32 in
Snow
6.0 in
December records in Washington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 70.0°F (1982) | 1.9°F (1976) | 3.04 in (2010) |
| December 2 | 70.0°F (2006) | -5.1°F (1976) | 0.84 in (1986) |
| December 3 | 64.9°F (1982) | -15.0°F (1976) | 2.30 in (1991) |
| December 4 | 82.0°F (1982) | 10.0°F (1976) | 0.68 in (1990) |
| December 5 | 75.9°F (1982) | 6.1°F (1976) | 0.78 in (1994) |
| December 6 | 72.0°F (2001) | -2.0°F (1977) | 1.52 in (2013) |
| December 7 | 71.1°F (1998) | 1.9°F (1977) | 0.98 in (1976) |
| December 8 | 69.1°F (2004) | 0.0°F (1977) | 1.01 in (2012) |
| December 9 | 60.1°F (1987) | 0.0°F (1977) | 1.33 in (2009) |
| December 10 | 57.9°F (1999) | 0.0°F (1977) | 0.48 in (2008) |
| December 11 | 55.0°F (2004) | 1.9°F (1977) | 1.11 in (1992) |
| December 12 | 64.0°F (2007) | 3.0°F (1988) | 1.12 in (2008) |
| December 13 | 62.1°F (2006) | 0.0°F (1982) | 0.45 in (1996) |
| December 14 | 66.0°F (1975) | 5.0°F (2008) | 1.02 in (1991) |
| December 15 | 62.1°F (1975) | 6.1°F (1989) | 0.84 in (1999) |
| December 16 | 62.1°F (1977) | -2.0°F (1989) | 0.84 in (2005) |
| December 17 | 62.1°F (1977) | -2.9°F (1989) | 0.63 in (2000) |
| December 18 | 60.1°F (2006) | -5.1°F (1989) | 1.03 in (2001) |
| December 19 | 57.9°F (2006) | -4.0°F (1989) | 0.99 in (1990) |
| December 20 | 61.0°F (2002) | -2.0°F (2004) | 1.48 in (2008) |
| December 21 | 57.9°F (1988) | -0.9°F (2004) | 0.66 in (2012) |
| December 22 | 64.0°F (1990) | -13.0°F (1989) | 1.22 in (1998) |
| December 23 | 70.0°F (2013) | -13.0°F (1989) | 0.55 in (2006) |
| December 24 | 57.0°F (1996) | -2.0°F (1976) | 0.48 in (2008) |
| December 25 | 68.0°F (1982) | -2.9°F (1989) | 1.04 in (2008) |
| December 26 | 69.1°F (1982) | -16.1°F (1983) | 1.01 in (1975) |
| December 27 | 78.1°F (1982) | -16.1°F (1983) | 0.90 in (2008) |
| December 28 | 68.0°F (2008) | 1.0°F (1977) | 0.95 in (2011) |
| December 29 | 69.1°F (1982) | -8.0°F (1976) | 0.47 in (1988) |
| December 30 | 64.9°F (1990) | -9.9°F (1976) | 0.50 in (2013) |
| December 31 | 64.9°F (1990) | 0.0°F (1983) | 1.04 in (1990) |