December weather in Riverside, CA
The average temperature in Riverside in December is 55.6°F (42.1°F–69.1°F). Average precipitation: 1.40 inches.
December is a winter month in Riverside, and is cooler than the annual average of 66.9°F. Daily temperatures swing about 27°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 9h 45m. For travel, December is a comfortable month to visit.
Avg High
69.1°F
Avg Low
42.1°F
Precipitation
1.40 in
Daylight
9h 45m
December records in Riverside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 89.1°F (2008) | 30.0°F (1933) | 0.76 in (1925) |
| December 2 | 87.1°F (1946) | 28.0°F (1936) | 1.26 in (1961) |
| December 3 | 93.9°F (1958) | 28.9°F (1894) | 2.08 in (1966) |
| December 4 | 88.0°F (1939) | 25.0°F (1909) | 1.32 in (1974) |
| December 5 | 90.0°F (1939) | 26.1°F (1948) | 1.50 in (1966) |
| December 6 | 90.0°F (1938) | 28.0°F (1948) | 2.16 in (1997) |
| December 7 | 90.0°F (1938) | 21.9°F (1998) | 1.73 in (1992) |
| December 8 | 87.1°F (1938) | 27.0°F (1916) | 0.72 in (1926) |
| December 9 | 91.0°F (1938) | 26.1°F (1916) | 1.47 in (1909) |
| December 10 | 87.1°F (1958) | 27.0°F (1919) | 1.23 in (1941) |
| December 11 | 90.0°F (1958) | 23.0°F (1949) | 3.28 in (1943) |
| December 12 | 88.0°F (1988) | 21.0°F (1949) | 1.31 in (1951) |
| December 13 | 89.1°F (1988) | 26.1°F (1931) | 0.85 in (2012) |
| December 14 | 82.9°F (1953) | 23.0°F (1945) | 1.18 in (2021) |
| December 15 | 86.0°F (1942) | 27.0°F (1901) | 1.05 in (1957) |
| December 16 | 86.0°F (1939) | 28.0°F (1901) | 1.22 in (2002) |
| December 17 | 90.0°F (2013) | 27.0°F (1916) | 0.85 in (1940) |
| December 18 | 89.1°F (1917) | 28.9°F (1908) | 1.42 in (1921) |
| December 19 | 90.0°F (1917) | 26.1°F (1909) | 1.43 in (1894) |
| December 20 | 87.1°F (1939) | 27.0°F (1948) | 2.04 in (1921) |
| December 21 | 90.0°F (1917) | 25.0°F (1949) | 0.85 in (1921) |
| December 22 | 84.9°F (1915) | 25.0°F (1930) | 2.36 in (1945) |
| December 23 | 84.0°F (1915) | 26.1°F (1930) | 1.30 in (1945) |
| December 24 | 86.0°F (1919) | 24.1°F (1953) | 1.20 in (2021) |
| December 25 | 84.9°F (2006) | 25.0°F (1926) | 1.14 in (1940) |
| December 26 | 86.0°F (1980) | 21.0°F (1911) | 1.59 in (1921) |
| December 27 | 86.0°F (1947) | 24.1°F (1911) | 1.31 in (1948) |
| December 28 | 88.0°F (2011) | 27.0°F (1912) | 2.00 in (1936) |
| December 29 | 90.0°F (1917) | 24.1°F (1954) | 1.00 in (1951) |
| December 30 | 86.0°F (1917) | 21.9°F (1895) | 2.17 in (1951) |
| December 31 | 91.0°F (1917) | 25.0°F (1918) | 1.40 in (1909) |