January weather in Rainier, WA
The average temperature in Rainier in January is 39.6°F (33.2°F–46.0°F). Average precipitation: 7.80 inches. Average snowfall is 2.0 inches.
January is a winter month in Rainier, and is cooler than the annual average of 50.5°F. Daily temperatures swing about 12.8°F between overnight low and afternoon high. Expect about 20 days with precipitation. Daylight averages about 8h 43m. For travel, January is a wet month.
Avg High
46.0°F
Avg Low
33.2°F
Precipitation
7.80 in
Snow
2.0 in
January records in Rainier
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.0°F (1997) | -8.0°F (1979) | 1.44 in (1963) |
| January 2 | 55.9°F (2003) | 6.1°F (1950) | 2.26 in (2021) |
| January 3 | 59.0°F (1984) | 5.0°F (1950) | 1.60 in (1984) |
| January 4 | 61.0°F (1984) | 9.0°F (1959) | 2.46 in (2015) |
| January 5 | 57.0°F (2023) | 3.9°F (1979) | 1.95 in (1954) |
| January 6 | 55.9°F (2002) | 3.0°F (1979) | 3.99 in (2022) |
| January 7 | 57.0°F (2002) | 6.1°F (1979) | 4.82 in (2009) |
| January 8 | 55.0°F (1953) | 9.0°F (1974) | 1.20 in (1990) |
| January 9 | 57.0°F (2010) | 6.1°F (1974) | 3.82 in (1990) |
| January 10 | 57.0°F (1961) | 8.1°F (1949) | 1.56 in (2006) |
| January 11 | 59.0°F (1983) | 6.1°F (1963) | 1.89 in (2018) |
| January 12 | 61.0°F (2022) | 5.0°F (1963) | 3.04 in (2021) |
| January 13 | 57.9°F (2026) | 10.9°F (1963) | 2.08 in (1970) |
| January 14 | 57.9°F (1943) | 6.1°F (1950) | 1.93 in (1976) |
| January 15 | 57.9°F (1974) | 14.0°F (1947) | 1.60 in (1961) |
| January 16 | 55.9°F (2011) | 16.0°F (1950) | 1.49 in (2006) |
| January 17 | 57.9°F (1946) | 8.1°F (1950) | 2.21 in (2005) |
| January 18 | 60.1°F (2005) | 5.0°F (1943) | 3.23 in (1986) |
| January 19 | 64.0°F (2005) | 15.1°F (1984) | 2.47 in (1967) |
| January 20 | 59.0°F (1995) | 7.0°F (1954) | 3.05 in (1972) |
| January 21 | 57.0°F (2005) | 3.9°F (1962) | 1.73 in (2016) |
| January 22 | 63.0°F (1942) | 1.9°F (1943) | 2.03 in (1953) |
| January 23 | 55.9°F (2005) | 3.9°F (1969) | 1.83 in (1982) |
| January 24 | 57.9°F (2015) | 1.0°F (1949) | 2.47 in (2002) |
| January 25 | 57.0°F (2003) | 1.9°F (1950) | 2.11 in (1971) |
| January 26 | 63.0°F (2015) | 0.0°F (1957) | 2.08 in (1970) |
| January 27 | 61.0°F (2024) | -7.1°F (1972) | 1.48 in (1992) |
| January 28 | 63.0°F (2024) | -4.0°F (1972) | 2.25 in (1999) |
| January 29 | 59.0°F (2024) | 0.0°F (1972) | 2.23 in (2006) |
| January 30 | 59.0°F (2024) | 6.1°F (1950) | 1.08 in (1952) |
| January 31 | 61.0°F (1954) | 1.0°F (1950) | 2.55 in (1987) |