December weather in Isleton, CA
The average temperature in Isleton in December is 48.1°F (40.4°F–55.8°F). Average precipitation: 2.53 inches.
December is a winter month in Isleton, and is cooler than the annual average of 62.5°F. Daily temperatures swing about 15.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 21m. For travel, December is a comfortable month to visit.
Avg High
55.8°F
Avg Low
40.4°F
Precipitation
2.53 in
Daylight
9h 21m
December records in Isleton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.0°F (1977) | 28.0°F (1976) | 0.93 in (1973) |
| December 2 | 75.0°F (2011) | 28.0°F (1969) | 1.49 in (2014) |
| December 3 | 70.0°F (1958) | 28.0°F (1957) | 1.36 in (2014) |
| December 4 | 70.0°F (1958) | 28.9°F (1968) | 0.90 in (2018) |
| December 5 | 73.9°F (1958) | 25.0°F (1972) | 0.56 in (1987) |
| December 6 | 72.0°F (1979) | 28.9°F (1959) | 1.88 in (2007) |
| December 7 | 72.0°F (2020) | 28.0°F (1959) | 1.01 in (2004) |
| December 8 | 68.0°F (2011) | 26.1°F (1972) | 0.58 in (1997) |
| December 9 | 69.1°F (2010) | 19.9°F (1972) | 0.70 in (1955) |
| December 10 | 69.1°F (2010) | 19.0°F (1972) | 0.50 in (1999) |
| December 11 | 66.9°F (2006) | 18.0°F (1972) | 2.81 in (2014) |
| December 12 | 73.0°F (1958) | 18.0°F (1972) | 2.18 in (1995) |
| December 13 | 73.9°F (1958) | 21.9°F (1972) | 0.58 in (1995) |
| December 14 | 68.0°F (1956) | 23.0°F (1972) | 1.60 in (2002) |
| December 15 | 69.1°F (2011) | 23.0°F (1975) | 0.85 in (1957) |
| December 16 | 68.0°F (1976) | 21.9°F (1967) | 1.55 in (2002) |
| December 17 | 70.0°F (1958) | 24.1°F (1967) | 0.70 in (2005) |
| December 18 | 70.0°F (1958) | 24.1°F (1965) | 0.58 in (2005) |
| December 19 | 66.9°F (1999) | 27.0°F (1965) | 0.79 in (1955) |
| December 20 | 66.9°F (1981) | 23.0°F (1965) | 1.79 in (1969) |
| December 21 | 66.9°F (2014) | 21.0°F (1965) | 0.62 in (1996) |
| December 22 | 66.9°F (1999) | 19.9°F (1990) | 1.20 in (1982) |
| December 23 | 66.0°F (1964) | 19.9°F (1990) | 1.90 in (2012) |
| December 24 | 66.9°F (1964) | 25.0°F (1990) | 1.27 in (1979) |
| December 25 | 69.1°F (1964) | 21.9°F (1990) | 0.93 in (1971) |
| December 26 | 66.9°F (2006) | 24.1°F (1956) | 0.70 in (1955) |
| December 27 | 68.0°F (1967) | 24.1°F (1962) | 0.94 in (2004) |
| December 28 | 69.1°F (1967) | 24.1°F (1976) | 2.20 in (2005) |
| December 29 | 71.1°F (1967) | 24.1°F (1960) | 0.87 in (1965) |
| December 30 | 71.1°F (2011) | 24.1°F (1962) | 1.51 in (2005) |
| December 31 | 70.0°F (2011) | 21.0°F (1978) | 0.97 in (2004) |