December weather in Vernonia, OR
The average temperature in Vernonia in December is 37.8°F (31.3°F–44.3°F). Average precipitation: 8.33 inches. Average snowfall is 0.2 inches.
December is a winter month in Vernonia, and is cooler than the annual average of 49.4°F. Daily temperatures swing about 13°F between overnight low and afternoon high. Expect about 20 days with precipitation. Daylight averages about 8h 29m. For travel, December is a wet month.
Avg High
44.3°F
Avg Low
31.3°F
Precipitation
8.33 in
Snow
0.2 in
December records in Vernonia
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.9°F (2021) | 5.0°F (1985) | 1.85 in (1993) |
| December 2 | 57.9°F (1976) | 14.0°F (1985) | 3.03 in (2007) |
| December 3 | 55.9°F (1989) | 18.0°F (1976) | 2.27 in (2007) |
| December 4 | 59.0°F (2023) | 14.0°F (2013) | 2.57 in (1982) |
| December 5 | 57.0°F (1989) | 12.9°F (2013) | 2.03 in (1981) |
| December 6 | 55.0°F (2014) | 5.0°F (2013) | 2.10 in (1970) |
| December 7 | 57.0°F (2015) | -5.1°F (1972) | 1.61 in (2004) |
| December 8 | 57.9°F (2015) | -11.9°F (1972) | 2.69 in (2025) |
| December 9 | 59.0°F (2014) | -11.9°F (1972) | 1.72 in (2023) |
| December 10 | 59.0°F (1993) | -11.0°F (1972) | 1.41 in (1968) |
| December 11 | 57.0°F (2014) | -4.0°F (1972) | 1.63 in (1995) |
| December 12 | 55.9°F (2010) | 15.1°F (1985) | 1.62 in (1969) |
| December 13 | 55.9°F (2025) | -0.9°F (1972) | 1.62 in (2001) |
| December 14 | 57.9°F (1969) | 1.9°F (1972) | 1.91 in (2006) |
| December 15 | 59.0°F (2025) | 12.9°F (2008) | 1.52 in (1982) |
| December 16 | 63.0°F (1980) | 8.1°F (2008) | 2.10 in (1982) |
| December 17 | 62.1°F (1980) | 15.1°F (2005) | 1.90 in (1997) |
| December 18 | 59.0°F (2004) | 17.1°F (1984) | 1.79 in (2025) |
| December 19 | 53.1°F (2024) | 8.1°F (1990) | 1.97 in (2019) |
| December 20 | 55.0°F (1973) | -7.1°F (1990) | 2.13 in (2019) |
| December 21 | 55.9°F (1974) | 7.0°F (1983) | 2.00 in (1972) |
| December 22 | 57.9°F (1973) | 1.0°F (1990) | 1.46 in (1980) |
| December 23 | 53.1°F (1967) | 1.0°F (1983) | 1.31 in (1969) |
| December 24 | 55.9°F (2005) | 1.9°F (1983) | 0.93 in (2006) |
| December 25 | 55.9°F (1980) | 12.0°F (1983) | 1.85 in (2024) |
| December 26 | 64.0°F (2022) | 15.1°F (1985) | 2.06 in (2022) |
| December 27 | 57.9°F (1980) | 15.1°F (1985) | 1.83 in (1974) |
| December 28 | 57.9°F (1980) | 3.9°F (1990) | 1.90 in (1998) |
| December 29 | 57.0°F (1980) | 7.0°F (1978) | 2.42 in (1996) |
| December 30 | 53.1°F (1975) | 7.0°F (1978) | 1.34 in (1988) |
| December 31 | 57.0°F (1980) | 7.0°F (1978) | 1.43 in (1970) |