December weather in San Juan Bautista, CA
The average temperature in San Juan Bautista in December is 48.3°F (37.6°F–58.9°F). Average precipitation: 2.27 inches.
December is a winter month in San Juan Bautista, and is cooler than the annual average of 58.6°F. Daily temperatures swing about 21.3°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 29m. For travel, December is cool.
Avg High
58.9°F
Avg Low
37.6°F
Precipitation
2.27 in
Snow
0.1 in
December records in San Juan Bautista
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.9°F (2021) | 27.0°F (1990) | 0.45 in (1998) |
| December 2 | 73.9°F (1986) | 24.1°F (1990) | 1.03 in (2005) |
| December 3 | 75.0°F (1986) | 25.0°F (2004) | 1.34 in (1948) |
| December 4 | 72.0°F (1975) | 23.0°F (2013) | 0.98 in (1980) |
| December 5 | 73.9°F (2023) | 21.9°F (2013) | 0.75 in (1997) |
| December 6 | 73.9°F (2023) | 23.0°F (2013) | 0.43 in (1950) |
| December 7 | 73.0°F (1979) | 27.0°F (2013) | 0.73 in (1997) |
| December 8 | 75.9°F (1979) | 23.0°F (2013) | 0.59 in (2004) |
| December 9 | 78.1°F (1995) | 23.0°F (2013) | 0.27 in (2016) |
| December 10 | 72.0°F (1975) | 23.0°F (2013) | 1.45 in (2003) |
| December 11 | 72.0°F (1988) | 26.1°F (1985) | 0.96 in (2006) |
| December 12 | 73.0°F (1988) | 24.1°F (1985) | 2.01 in (2014) |
| December 13 | 69.1°F (1988) | 25.0°F (1985) | 0.40 in (1995) |
| December 14 | 72.0°F (2017) | 26.1°F (1989) | 1.85 in (2021) |
| December 15 | 75.9°F (1980) | 21.9°F (2020) | 2.00 in (2002) |
| December 16 | 77.0°F (1980) | 27.0°F (1991) | 0.57 in (2016) |
| December 17 | 73.9°F (1979) | 17.1°F (2008) | 0.67 in (1990) |
| December 18 | 73.0°F (1979) | 27.0°F (2016) | 0.50 in (2023) |
| December 19 | 71.1°F (1975) | 26.1°F (2006) | 1.06 in (2005) |
| December 20 | 78.1°F (1999) | 26.1°F (1990) | 1.30 in (2010) |
| December 21 | 72.0°F (1999) | 21.0°F (1990) | 0.62 in (1996) |
| December 22 | 70.0°F (1999) | 14.0°F (1990) | 1.27 in (1996) |
| December 23 | 72.0°F (2024) | 15.1°F (1990) | 0.94 in (1982) |
| December 24 | 71.1°F (1999) | 16.0°F (1990) | 0.88 in (1988) |
| December 25 | 75.0°F (1980) | 19.9°F (1990) | 0.51 in (1979) |
| December 26 | 78.1°F (1980) | 21.9°F (1990) | 0.30 in (1983) |
| December 27 | 73.0°F (2013) | 21.9°F (1990) | 0.42 in (2006) |
| December 28 | 72.0°F (2000) | 24.1°F (1990) | 0.80 in (2001) |
| December 29 | 70.0°F (1999) | 21.9°F (1990) | 1.49 in (2003) |
| December 30 | 73.9°F (1975) | 19.9°F (1990) | 1.64 in (2003) |
| December 31 | 69.1°F (2000) | 21.0°F (1990) | 0.39 in (1983) |