December weather in Ilwaco, WA
The average temperature in Ilwaco in December is 42.0°F (35.8°F–48.2°F). Average precipitation: 12.15 inches.
December is a winter month in Ilwaco, and is cooler than the annual average of 49.8°F. Daily temperatures swing about 12.4°F between overnight low and afternoon high. Expect about 23 days with precipitation. Daylight averages about 8h 25m. For travel, December is a wet month.
Avg High
48.2°F
Avg Low
35.8°F
Precipitation
12.15 in
Daylight
8h 25m
December records in Ilwaco
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 61.0°F (1988) | 23.0°F (1985) | 2.46 in (1987) |
| December 2 | 64.0°F (1976) | 23.0°F (2014) | 2.83 in (1979) |
| December 3 | 57.0°F (1982) | 24.1°F (1992) | 3.30 in (2007) |
| December 4 | 64.0°F (1988) | 21.0°F (1994) | 3.09 in (1971) |
| December 5 | 61.0°F (1997) | 19.0°F (2013) | 1.53 in (1981) |
| December 6 | 60.1°F (2002) | 19.0°F (2013) | 2.07 in (1970) |
| December 7 | 59.0°F (2006) | 5.0°F (1972) | 1.70 in (2004) |
| December 8 | 57.9°F (1989) | 0.0°F (1972) | 1.93 in (2015) |
| December 9 | 60.1°F (2002) | 5.0°F (1972) | 1.65 in (1999) |
| December 10 | 61.0°F (1995) | 3.9°F (1972) | 3.38 in (1993) |
| December 11 | 64.0°F (1995) | 10.0°F (1972) | 2.96 in (1977) |
| December 12 | 57.9°F (2002) | 17.1°F (2009) | 1.63 in (1973) |
| December 13 | 55.9°F (1980) | 12.9°F (1972) | 1.94 in (1977) |
| December 14 | 60.1°F (2018) | 23.0°F (1967) | 1.85 in (2010) |
| December 15 | 59.0°F (2018) | 25.0°F (2008) | 2.80 in (1999) |
| December 16 | 63.0°F (1980) | 18.0°F (2008) | 2.63 in (1982) |
| December 17 | 59.0°F (1980) | 18.0°F (2008) | 2.12 in (1979) |
| December 18 | 57.0°F (1988) | 24.1°F (1992) | 3.51 in (1979) |
| December 19 | 66.9°F (2004) | 17.1°F (1984) | 1.75 in (2017) |
| December 20 | 60.1°F (1985) | 17.1°F (1990) | 3.80 in (2012) |
| December 21 | 55.9°F (2014) | 8.1°F (1990) | 2.77 in (1972) |
| December 22 | 55.0°F (1980) | 10.0°F (1983) | 2.24 in (2008) |
| December 23 | 63.0°F (1999) | 7.0°F (1983) | 2.11 in (1968) |
| December 24 | 63.0°F (1999) | 8.1°F (1983) | 2.05 in (2005) |
| December 25 | 61.0°F (1985) | 24.1°F (1993) | 2.52 in (1996) |
| December 26 | 62.1°F (1985) | 23.0°F (1971) | 2.64 in (1975) |
| December 27 | 61.0°F (1999) | 24.1°F (1985) | 3.25 in (1994) |
| December 28 | 60.1°F (1999) | 17.1°F (1978) | 1.54 in (1998) |
| December 29 | 59.0°F (1980) | 14.0°F (1978) | 3.42 in (2008) |
| December 30 | 62.1°F (1995) | 15.1°F (1978) | 2.30 in (1996) |
| December 31 | 55.0°F (1976) | 12.0°F (1978) | 3.75 in (1968) |