December weather in Montesano, WA
The average temperature in Montesano in December is 40.6°F (33.8°F–47.4°F). Average precipitation: 11.37 inches.
December is a winter month in Montesano, and is cooler than the annual average of 52.3°F. Daily temperatures swing about 13.6°F between overnight low and afternoon high. Expect about 23 days with precipitation. Daylight averages about 8h 19m. For travel, December is a wet month.
Avg High
47.4°F
Avg Low
33.8°F
Precipitation
11.37 in
Daylight
8h 19m
December records in Montesano
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (1956) | 18.0°F (1985) | 2.45 in (1998) |
| December 2 | 62.1°F (1940) | 18.0°F (2014) | 3.64 in (1977) |
| December 3 | 62.1°F (1943) | 19.9°F (1992) | 4.77 in (2007) |
| December 4 | 60.1°F (1940) | 16.0°F (2013) | 2.65 in (1989) |
| December 5 | 62.1°F (2020) | 14.0°F (2013) | 3.09 in (2023) |
| December 6 | 59.0°F (1965) | 19.9°F (1956) | 1.66 in (1957) |
| December 7 | 59.0°F (1957) | 14.0°F (2009) | 1.34 in (1970) |
| December 8 | 61.0°F (1957) | 1.9°F (1972) | 2.40 in (2025) |
| December 9 | 62.1°F (2014) | 6.1°F (2009) | 2.15 in (1953) |
| December 10 | 57.9°F (2004) | 6.1°F (1972) | 2.93 in (2025) |
| December 11 | 62.1°F (1896) | 8.1°F (2009) | 1.79 in (2002) |
| December 12 | 60.1°F (1995) | 9.0°F (2009) | 2.48 in (2010) |
| December 13 | 59.0°F (1953) | 14.0°F (1972) | 2.59 in (2001) |
| December 14 | 62.1°F (1952) | 18.0°F (1967) | 2.00 in (2006) |
| December 15 | 60.1°F (2025) | 18.0°F (2016) | 3.33 in (1999) |
| December 16 | 59.0°F (1956) | 12.0°F (1964) | 2.86 in (1997) |
| December 17 | 62.1°F (1957) | 10.0°F (1964) | 2.78 in (1979) |
| December 18 | 60.1°F (2014) | 18.0°F (2005) | 2.00 in (2018) |
| December 19 | 66.0°F (1897) | 16.0°F (1984) | 2.95 in (1941) |
| December 20 | 57.0°F (1974) | 12.9°F (1990) | 4.95 in (2019) |
| December 21 | 57.9°F (1896) | 3.0°F (1990) | 1.94 in (1972) |
| December 22 | 60.1°F (1940) | 5.0°F (1983) | 1.93 in (1955) |
| December 23 | 62.1°F (1896) | 3.9°F (1983) | 2.08 in (1950) |
| December 24 | 57.9°F (1950) | 8.1°F (1990) | 2.20 in (2005) |
| December 25 | 60.1°F (1950) | 8.1°F (1990) | 1.70 in (1957) |
| December 26 | 61.0°F (1980) | 9.0°F (1990) | 3.40 in (1994) |
| December 27 | 59.0°F (1980) | 10.0°F (1990) | 3.10 in (1994) |
| December 28 | 55.0°F (1980) | 17.1°F (1978) | 2.65 in (1949) |
| December 29 | 55.0°F (1958) | 10.0°F (1978) | 3.73 in (1996) |
| December 30 | 64.9°F (1958) | 10.0°F (1978) | 1.79 in (1970) |
| December 31 | 59.0°F (1963) | 3.0°F (1978) | 1.95 in (2019) |