December weather in South El Monte, CA
The average temperature in South El Monte in December is 56.6°F (45.3°F–67.8°F). Average precipitation: 2.44 inches.
December is a winter month in South El Monte, and is cooler than the annual average of 66°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 9h 44m. For travel, December is a comfortable month to visit.
Avg High
67.8°F
Avg Low
45.3°F
Precipitation
2.44 in
Daylight
9h 44m
December records in South El Monte
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 93.0°F (1959) | 35.1°F (1991) | 0.54 in (1947) |
| December 2 | 91.0°F (1958) | 34.0°F (1945) | 1.45 in (1961) |
| December 3 | 96.1°F (1958) | 34.0°F (1955) | 2.89 in (1966) |
| December 4 | 91.0°F (1979) | 32.0°F (1948) | 2.88 in (1974) |
| December 5 | 88.0°F (1979) | 30.9°F (1948) | 1.89 in (1947) |
| December 6 | 86.0°F (1959) | 10.0°F (1998) | 1.43 in (1966) |
| December 7 | 87.1°F (1940) | 27.0°F (1978) | 0.73 in (2009) |
| December 8 | 88.0°F (1975) | 26.1°F (1978) | 0.71 in (1949) |
| December 9 | 90.0°F (1950) | 26.1°F (1951) | 0.85 in (1996) |
| December 10 | 91.9°F (1950) | 30.0°F (1951) | 2.19 in (1941) |
| December 11 | 91.0°F (1958) | 30.9°F (1947) | 1.36 in (1996) |
| December 12 | 88.0°F (1988) | 28.0°F (1949) | 1.13 in (2009) |
| December 13 | 88.0°F (1953) | 28.9°F (1949) | 1.24 in (1995) |
| December 14 | 87.1°F (1953) | 30.9°F (1972) | 0.75 in (2021) |
| December 15 | 87.1°F (1976) | 30.0°F (1948) | 1.22 in (2008) |
| December 16 | 90.0°F (1998) | 30.9°F (1971) | 1.70 in (2002) |
| December 17 | 88.0°F (1998) | 33.1°F (1990) | 1.66 in (1940) |
| December 18 | 84.9°F (1985) | 33.1°F (1965) | 1.85 in (1949) |
| December 19 | 86.0°F (1960) | 32.0°F (1960) | 1.90 in (1970) |
| December 20 | 88.0°F (1960) | 30.0°F (1967) | 1.33 in (2002) |
| December 21 | 84.0°F (1985) | 26.1°F (1968) | 1.79 in (1970) |
| December 22 | 84.9°F (1960) | 24.1°F (1990) | 3.67 in (1945) |
| December 23 | 87.1°F (1950) | 27.0°F (1990) | 2.20 in (1940) |
| December 24 | 88.0°F (1950) | 27.0°F (1948) | 2.71 in (1971) |
| December 25 | 88.0°F (1950) | 28.0°F (1998) | 2.31 in (2025) |
| December 26 | 84.9°F (1980) | 27.0°F (1987) | 3.24 in (1946) |
| December 27 | 86.0°F (1947) | 30.0°F (1987) | 1.67 in (1971) |
| December 28 | 86.0°F (1963) | 28.0°F (1954) | 2.75 in (1977) |
| December 29 | 90.0°F (1980) | 28.0°F (1954) | 4.03 in (1965) |
| December 30 | 89.1°F (1980) | 30.0°F (2002) | 2.34 in (2021) |
| December 31 | 91.9°F (1997) | 28.9°F (1947) | 1.03 in (2005) |