December weather in St. John, WA
The average temperature in St. John in December is 31.5°F (27.9°F–35.1°F). Average precipitation: 2.38 inches. Average snowfall is 10.7 inches.
December is a winter month in St. John, and is cooler than the annual average of 49.3°F. Daily temperatures swing about 7.2°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 8h 19m. For travel, December is cold.
Avg High
35.1°F
Avg Low
27.9°F
Precipitation
2.38 in
Snow
10.7 in
December records in St. John
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.0°F (1995) | -15.0°F (1985) | 0.65 in (1978) |
| December 2 | 53.1°F (1975) | 7.0°F (1985) | 1.02 in (1999) |
| December 3 | 55.0°F (1982) | 5.0°F (1978) | 0.91 in (2007) |
| December 4 | 55.9°F (2007) | 3.9°F (1972) | 0.78 in (1975) |
| December 5 | 55.0°F (1965) | 3.0°F (1972) | 0.52 in (1986) |
| December 6 | 54.0°F (1987) | 1.9°F (1978) | 0.65 in (1987) |
| December 7 | 51.1°F (1987) | -11.9°F (1980) | 1.08 in (2015) |
| December 8 | 57.0°F (2015) | -9.9°F (1980) | 0.77 in (2004) |
| December 9 | 55.9°F (2015) | -11.0°F (1980) | 0.56 in (1995) |
| December 10 | 59.0°F (1981) | -11.9°F (1972) | 0.82 in (1984) |
| December 11 | 61.0°F (2014) | 0.0°F (1972) | 0.63 in (2018) |
| December 12 | 57.9°F (2014) | 5.0°F (2005) | 0.73 in (1995) |
| December 13 | 55.0°F (1995) | -7.1°F (1972) | 1.13 in (1966) |
| December 14 | 55.9°F (2006) | 3.0°F (1985) | 0.79 in (1977) |
| December 15 | 57.9°F (2002) | 5.0°F (1967) | 0.58 in (1981) |
| December 16 | 57.9°F (2002) | -20.0°F (1964) | 0.81 in (1997) |
| December 17 | 54.0°F (1976) | -20.0°F (1964) | 0.75 in (1973) |
| December 18 | 54.0°F (1979) | -11.0°F (1984) | 0.96 in (2008) |
| December 19 | 54.0°F (1972) | -11.0°F (1984) | 0.60 in (1981) |
| December 20 | 54.0°F (1972) | -11.0°F (2008) | 0.51 in (2014) |
| December 21 | 55.0°F (1972) | -11.9°F (1990) | 0.67 in (1964) |
| December 22 | 53.1°F (1972) | -16.1°F (1983) | 0.62 in (1964) |
| December 23 | 51.1°F (1994) | -11.9°F (1983) | 0.51 in (2007) |
| December 24 | 54.0°F (2005) | -9.0°F (1990) | 0.42 in (2012) |
| December 25 | 53.1°F (1980) | -2.9°F (1990) | 1.27 in (1980) |
| December 26 | 59.0°F (1980) | -2.0°F (1987) | 0.94 in (1975) |
| December 27 | 57.9°F (1980) | -0.9°F (1983) | 0.52 in (1974) |
| December 28 | 53.1°F (1965) | -2.0°F (1968) | 0.54 in (2010) |
| December 29 | 52.0°F (2011) | -11.9°F (1968) | 1.15 in (2017) |
| December 30 | 50.0°F (1998) | -23.1°F (1968) | 0.61 in (2005) |
| December 31 | 51.1°F (1963) | -16.1°F (1978) | 0.78 in (2005) |