December weather in Rainier, OR
The average temperature in Rainier in December is 40.7°F (34.8°F–46.6°F). Average precipitation: 7.14 inches.
December is a winter month in Rainier, and is cooler than the annual average of 53.2°F. Daily temperatures swing about 11.8°F between overnight low and afternoon high. Expect about 24 days with precipitation. Daylight averages about 8h 27m. For travel, December is a wet month.
Avg High
46.6°F
Avg Low
34.8°F
Precipitation
7.14 in
Daylight
8h 27m
December records in Rainier
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 60.1°F (1926) | 18.0°F (1985) | 1.91 in (1975) |
| December 2 | 64.0°F (1934) | 18.0°F (1985) | 3.67 in (1977) |
| December 3 | 66.0°F (1934) | 25.0°F (1928) | 2.83 in (2007) |
| December 4 | 60.1°F (1938) | 21.9°F (1928) | 1.66 in (1982) |
| December 5 | 64.0°F (1945) | 16.0°F (1928) | 1.38 in (1971) |
| December 6 | 61.0°F (2023) | 18.0°F (1928) | 2.13 in (1933) |
| December 7 | 60.1°F (2015) | 12.0°F (1972) | 2.00 in (2015) |
| December 8 | 59.0°F (2015) | 3.9°F (1972) | 1.92 in (2025) |
| December 9 | 59.0°F (2025) | 3.9°F (1972) | 2.80 in (1933) |
| December 10 | 62.1°F (1993) | 7.0°F (1932) | 1.83 in (1933) |
| December 11 | 60.1°F (2014) | 3.9°F (1932) | 2.50 in (1946) |
| December 12 | 59.0°F (2014) | 6.1°F (1932) | 1.43 in (1946) |
| December 13 | 59.0°F (1998) | 10.0°F (1932) | 2.13 in (1946) |
| December 14 | 60.1°F (1977) | 8.1°F (1932) | 1.57 in (1977) |
| December 15 | 61.0°F (2025) | 10.9°F (1932) | 1.50 in (1946) |
| December 16 | 61.0°F (1943) | 16.0°F (1964) | 1.75 in (1982) |
| December 17 | 57.9°F (1974) | 10.0°F (1964) | 1.63 in (1997) |
| December 18 | 57.9°F (1959) | 10.0°F (1964) | 1.59 in (2018) |
| December 19 | 57.9°F (2003) | 16.0°F (1964) | 1.90 in (1934) |
| December 20 | 59.0°F (1994) | 16.0°F (1990) | 1.64 in (2019) |
| December 21 | 60.1°F (1940) | 5.0°F (1990) | 2.10 in (1972) |
| December 22 | 57.9°F (1933) | 5.0°F (1990) | 2.24 in (1936) |
| December 23 | 63.0°F (1925) | 6.1°F (1983) | 2.00 in (1950) |
| December 24 | 64.0°F (1950) | 6.1°F (1983) | 1.03 in (1965) |
| December 25 | 57.9°F (1947) | 12.9°F (1983) | 2.02 in (1996) |
| December 26 | 61.0°F (1980) | 19.9°F (1948) | 2.15 in (1937) |
| December 27 | 57.9°F (1980) | 19.0°F (1941) | 1.69 in (1974) |
| December 28 | 61.0°F (1980) | 18.0°F (1930) | 2.23 in (1998) |
| December 29 | 57.0°F (1925) | 10.9°F (1990) | 2.22 in (2017) |
| December 30 | 55.9°F (2023) | 10.0°F (1990) | 1.50 in (1988) |
| December 31 | 59.0°F (1980) | 8.1°F (1978) | 1.71 in (1970) |