December weather in Gilroy, CA
The average temperature in Gilroy in December is 48.7°F (37.0°F–60.4°F). Average precipitation: 3.69 inches.
December is a winter month in Gilroy, and is cooler than the annual average of 60.2°F. Daily temperatures swing about 23.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 28m. For travel, December is cool.
Avg High
60.4°F
Avg Low
37.0°F
Precipitation
3.69 in
Daylight
9h 28m
December records in Gilroy
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 80.1°F (2021) | 27.0°F (1957) | 1.32 in (1973) |
| December 2 | 75.9°F (1959) | 26.1°F (1990) | 2.00 in (2012) |
| December 3 | 75.0°F (1959) | 25.0°F (1957) | 2.80 in (1916) |
| December 4 | 79.0°F (1958) | 27.0°F (1990) | 2.60 in (1980) |
| December 5 | 79.0°F (1958) | 24.1°F (2013) | 1.77 in (1966) |
| December 6 | 73.0°F (1959) | 25.0°F (2013) | 1.98 in (1966) |
| December 7 | 72.0°F (1979) | 25.0°F (1960) | 1.25 in (2004) |
| December 8 | 75.9°F (1977) | 23.0°F (1978) | 0.96 in (1997) |
| December 9 | 73.0°F (1975) | 19.9°F (1972) | 2.66 in (1909) |
| December 10 | 73.9°F (1990) | 23.0°F (1978) | 2.00 in (1996) |
| December 11 | 72.0°F (1988) | 18.0°F (1972) | 4.20 in (1906) |
| December 12 | 73.9°F (1958) | 21.9°F (1972) | 3.50 in (2014) |
| December 13 | 78.1°F (1958) | 26.1°F (1972) | 1.56 in (2021) |
| December 14 | 72.0°F (1958) | 25.0°F (1972) | 2.20 in (1915) |
| December 15 | 79.0°F (1958) | 26.1°F (1964) | 1.42 in (1957) |
| December 16 | 75.0°F (1958) | 25.0°F (1965) | 1.95 in (2002) |
| December 17 | 75.9°F (1980) | 23.0°F (1965) | 1.32 in (1977) |
| December 18 | 75.0°F (1958) | 23.0°F (1965) | 1.13 in (1957) |
| December 19 | 73.0°F (1958) | 26.1°F (1971) | 1.73 in (2005) |
| December 20 | 73.0°F (1999) | 25.0°F (1965) | 2.05 in (1981) |
| December 21 | 75.0°F (1999) | 21.9°F (1968) | 2.20 in (2001) |
| December 22 | 71.1°F (1999) | 17.1°F (1990) | 5.40 in (1916) |
| December 23 | 71.1°F (1999) | 17.1°F (1990) | 2.00 in (1971) |
| December 24 | 72.0°F (1999) | 17.1°F (1990) | 2.33 in (1979) |
| December 25 | 75.0°F (2005) | 19.9°F (1990) | 1.12 in (1983) |
| December 26 | 72.0°F (2013) | 19.9°F (2015) | 1.33 in (2005) |
| December 27 | 75.0°F (1980) | 1.9°F (1998) | 1.60 in (2022) |
| December 28 | 73.0°F (1999) | 25.0°F (1966) | 0.91 in (2010) |
| December 29 | 71.1°F (1967) | 24.1°F (1990) | 6.63 in (1916) |
| December 30 | 72.0°F (1975) | 19.9°F (1990) | 2.51 in (2003) |
| December 31 | 70.0°F (2013) | 21.0°F (1978) | 4.45 in (1913) |