December weather in Kennewick, WA
The average temperature in Kennewick in December is 35.6°F (29.6°F–41.5°F). Average precipitation: 1.08 inches.
December is a winter month in Kennewick, and is cooler than the annual average of 55.1°F. Daily temperatures swing about 11.9°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 8h 26m. For travel, December is cold.
Avg High
41.5°F
Avg Low
29.6°F
Precipitation
1.08 in
Daylight
8h 26m
December records in Kennewick
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 66.0°F (1941) | -4.0°F (1985) | 0.73 in (1955) |
| December 2 | 72.0°F (2021) | -2.9°F (1985) | 0.30 in (1909) |
| December 3 | 66.9°F (1977) | 1.9°F (1919) | 0.49 in (1947) |
| December 4 | 69.1°F (2007) | 1.0°F (1919) | 0.63 in (1943) |
| December 5 | 66.0°F (1938) | 1.9°F (1919) | 0.70 in (1922) |
| December 6 | 61.0°F (1933) | -0.9°F (1919) | 0.65 in (1963) |
| December 7 | 64.0°F (1987) | 8.1°F (1919) | 0.70 in (2007) |
| December 8 | 64.9°F (1896) | -5.1°F (1972) | 0.40 in (1909) |
| December 9 | 69.1°F (2015) | -4.0°F (1919) | 0.36 in (1937) |
| December 10 | 66.0°F (1987) | -5.1°F (1932) | 0.49 in (1990) |
| December 11 | 69.1°F (2025) | -8.0°F (1932) | 0.60 in (1937) |
| December 12 | 70.0°F (1921) | -25.1°F (1919) | 0.85 in (1995) |
| December 13 | 66.0°F (1924) | -29.0°F (1919) | 0.39 in (1897) |
| December 14 | 62.1°F (1924) | -22.0°F (1919) | 0.79 in (2003) |
| December 15 | 66.0°F (2002) | -14.1°F (1919) | 0.55 in (2006) |
| December 16 | 70.0°F (2025) | -14.1°F (1922) | 0.29 in (1972) |
| December 17 | 64.9°F (2025) | -14.1°F (1922) | 0.52 in (1973) |
| December 18 | 71.1°F (1917) | -9.9°F (1924) | 0.35 in (1960) |
| December 19 | 62.1°F (1917) | -8.0°F (1924) | 0.72 in (2021) |
| December 20 | 62.1°F (1994) | 3.0°F (1984) | 0.43 in (1920) |
| December 21 | 68.0°F (1933) | -2.9°F (1990) | 0.75 in (2008) |
| December 22 | 66.0°F (1933) | -16.1°F (1924) | 0.72 in (1964) |
| December 23 | 64.0°F (1950) | -9.9°F (1924) | 0.45 in (1921) |
| December 24 | 64.0°F (1899) | -13.0°F (1924) | 0.54 in (1936) |
| December 25 | 68.0°F (1898) | -14.1°F (1924) | 0.55 in (1933) |
| December 26 | 71.1°F (1898) | -7.1°F (1924) | 0.41 in (2024) |
| December 27 | 64.9°F (1980) | 0.0°F (1924) | 0.50 in (1942) |
| December 28 | 66.9°F (1917) | -6.0°F (1996) | 0.30 in (1906) |
| December 29 | 64.9°F (1917) | -6.0°F (1996) | 0.93 in (2010) |
| December 30 | 60.1°F (1920) | -6.0°F (1990) | 0.50 in (2020) |
| December 31 | 59.0°F (1945) | -2.0°F (1911) | 1.13 in (1913) |