December weather in Monmouth, OR
The average temperature in Monmouth in December is 40.1°F (34.8°F–45.5°F). Average precipitation: 8.74 inches.
December is a winter month in Monmouth, and is cooler than the annual average of 53.1°F. Daily temperatures swing about 10.7°F between overnight low and afternoon high. Daylight averages about 8h 37m. For travel, December is a wet month.
Avg High
45.5°F
Avg Low
34.8°F
Precipitation
8.74 in
Daylight
8h 37m
December records in Monmouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 63.0°F (1958) | 18.0°F (1969) | 1.87 in (1993) |
| December 2 | 63.0°F (1958) | 16.0°F (1969) | 2.15 in (1980) |
| December 3 | 62.1°F (1958) | 19.0°F (1969) | 2.04 in (1987) |
| December 4 | 60.1°F (2023) | 23.0°F (1976) | 3.05 in (1968) |
| December 5 | 62.1°F (1938) | 10.9°F (1972) | 2.60 in (1981) |
| December 6 | 57.9°F (1941) | 18.0°F (1978) | 2.38 in (2023) |
| December 7 | 60.1°F (1957) | 12.0°F (1972) | 3.31 in (2015) |
| December 8 | 60.1°F (1938) | 1.9°F (1972) | 1.98 in (1942) |
| December 9 | 61.0°F (2015) | -2.0°F (1972) | 2.26 in (1987) |
| December 10 | 63.0°F (1993) | -2.0°F (1972) | 2.56 in (1992) |
| December 11 | 62.1°F (1956) | -2.0°F (1972) | 2.09 in (1969) |
| December 12 | 63.0°F (1960) | 19.0°F (2013) | 1.51 in (1959) |
| December 13 | 61.0°F (1937) | 3.0°F (1972) | 3.26 in (1977) |
| December 14 | 60.1°F (1942) | 15.1°F (1972) | 2.28 in (2006) |
| December 15 | 60.1°F (1974) | 17.1°F (1940) | 2.17 in (1977) |
| December 16 | 61.0°F (2025) | 18.0°F (1964) | 2.81 in (1939) |
| December 17 | 60.1°F (1957) | 8.1°F (1964) | 1.85 in (1949) |
| December 18 | 60.1°F (1937) | 14.0°F (1964) | 2.50 in (2018) |
| December 19 | 57.9°F (1936) | 18.0°F (1965) | 2.60 in (1953) |
| December 20 | 59.0°F (1994) | 10.0°F (1990) | 1.76 in (1973) |
| December 21 | 60.1°F (1955) | 5.0°F (1990) | 2.32 in (1971) |
| December 22 | 64.9°F (1964) | 8.1°F (1990) | 4.32 in (1964) |
| December 23 | 59.0°F (1964) | 10.0°F (1983) | 1.35 in (1964) |
| December 24 | 57.9°F (2005) | 10.9°F (1990) | 1.87 in (1965) |
| December 25 | 59.0°F (1980) | 19.9°F (1983) | 3.40 in (1980) |
| December 26 | 61.0°F (1964) | 18.0°F (1962) | 1.15 in (1955) |
| December 27 | 63.0°F (1964) | 16.0°F (1948) | 3.50 in (1937) |
| December 28 | 66.0°F (1964) | 14.0°F (1978) | 2.31 in (2005) |
| December 29 | 57.0°F (1950) | 10.9°F (1978) | 3.37 in (1937) |
| December 30 | 64.9°F (1980) | 9.0°F (1968) | 2.29 in (2005) |
| December 31 | 60.1°F (1980) | 9.0°F (1968) | 1.57 in (1996) |