December weather in Troutdale, OR
The average temperature in Troutdale in December is 40.2°F (35.8°F–44.5°F). Average precipitation: 7.10 inches.
December is a winter month in Troutdale, and is cooler than the annual average of 53.4°F. Daily temperatures swing about 8.7°F between overnight low and afternoon high. Daylight averages about 8h 31m. For travel, December is a wet month.
Avg High
44.5°F
Avg Low
35.8°F
Precipitation
7.10 in
Daylight
8h 31m
December records in Troutdale
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (2012) | 12.9°F (1985) | 1.21 in (2014) |
| December 2 | 62.1°F (1966) | 9.0°F (1985) | 1.80 in (1979) |
| December 3 | 64.0°F (1975) | 23.0°F (1985) | 2.02 in (1987) |
| December 4 | 61.0°F (1982) | -0.9°F (2006) | 1.48 in (1968) |
| December 5 | 64.9°F (2023) | 5.0°F (2002) | 2.50 in (2025) |
| December 6 | 64.0°F (1989) | 5.0°F (2006) | 1.70 in (1981) |
| December 7 | 62.1°F (1988) | 0.0°F (2006) | 1.80 in (1975) |
| December 8 | 60.1°F (1970) | 10.0°F (2006) | 0.99 in (1953) |
| December 9 | 62.1°F (1987) | 12.0°F (1972) | 2.37 in (2025) |
| December 10 | 63.0°F (1987) | 0.0°F (2006) | 1.58 in (1968) |
| December 11 | 64.9°F (2025) | 1.9°F (1986) | 1.19 in (1995) |
| December 12 | 64.0°F (2014) | 16.0°F (1972) | 1.36 in (1969) |
| December 13 | 64.0°F (1995) | 19.0°F (1972) | 2.60 in (1977) |
| December 14 | 63.0°F (1977) | 19.0°F (1972) | 1.91 in (2003) |
| December 15 | 62.1°F (2002) | 15.1°F (2006) | 1.12 in (1981) |
| December 16 | 60.1°F (1959) | 15.1°F (1964) | 1.80 in (1982) |
| December 17 | 64.0°F (1974) | 6.1°F (1964) | 1.20 in (1961) |
| December 18 | 64.0°F (2001) | -9.0°F (2003) | 1.60 in (2015) |
| December 19 | 59.0°F (1953) | 10.0°F (1964) | 2.03 in (2025) |
| December 20 | 60.1°F (1972) | 12.0°F (1990) | 1.30 in (1982) |
| December 21 | 64.0°F (1972) | 10.0°F (1990) | 2.00 in (1972) |
| December 22 | 62.1°F (1972) | 10.9°F (1990) | 1.50 in (2018) |
| December 23 | 66.0°F (1950) | -0.9°F (2022) | 1.46 in (1964) |
| December 24 | 55.0°F (1961) | 12.9°F (1990) | 1.37 in (1965) |
| December 25 | 72.0°F (2001) | 12.0°F (1990) | 1.82 in (1980) |
| December 26 | 68.0°F (1980) | 16.0°F (1990) | 1.07 in (1969) |
| December 27 | 61.0°F (1994) | 10.9°F (1983) | 1.48 in (1965) |
| December 28 | 63.0°F (1980) | 12.9°F (1985) | 1.88 in (1965) |
| December 29 | 57.9°F (1950) | 10.0°F (1990) | 1.80 in (2025) |
| December 30 | 59.0°F (1998) | 10.9°F (1990) | 1.48 in (2005) |
| December 31 | 55.0°F (1980) | 6.1°F (1968) | 1.35 in (2002) |