December weather in San Leandro, CA
The average temperature in San Leandro in December is 51.2°F (42.9°F–59.4°F). Average precipitation: 3.20 inches.
December is a winter month in San Leandro, and is cooler than the annual average of 59.7°F. Daily temperatures swing about 16.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 24m. For travel, December is a comfortable month to visit.
Avg High
59.4°F
Avg Low
42.9°F
Precipitation
3.20 in
Daylight
9h 24m
December records in San Leandro
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 71.1°F (2014) | 37.0°F (2004) | 0.57 in (2005) |
| December 2 | 73.0°F (2011) | 36.0°F (2004) | 1.03 in (2014) |
| December 3 | 66.9°F (2007) | 36.0°F (2004) | 0.85 in (2014) |
| December 4 | 70.0°F (2014) | 35.1°F (2004) | 0.20 in (2007) |
| December 5 | 70.0°F (2014) | 31.1°F (2013) | 0.47 in (2012) |
| December 6 | 70.0°F (2014) | 34.0°F (2009) | 0.61 in (2003) |
| December 7 | 75.9°F (2020) | 0.0°F (2007) | 0.82 in (2004) |
| December 8 | 72.0°F (2020) | 30.9°F (2009) | 0.90 in (2004) |
| December 9 | 70.0°F (2020) | 28.2°F (2013) | 0.33 in (2006) |
| December 10 | 71.1°F (2012) | 31.1°F (2013) | 1.27 in (2022) |
| December 11 | 66.9°F (2017) | 35.1°F (2013) | 3.28 in (2014) |
| December 12 | 66.0°F (2018) | 34.0°F (2013) | 1.34 in (2006) |
| December 13 | 64.9°F (2018) | 36.0°F (2007) | 1.82 in (2021) |
| December 14 | 73.0°F (2017) | 35.1°F (2007) | 1.15 in (2024) |
| December 15 | 68.0°F (1998) | 35.1°F (2013) | 0.88 in (2014) |
| December 16 | 70.0°F (1998) | 34.0°F (2013) | 1.19 in (2002) |
| December 17 | 68.0°F (2017) | 34.0°F (2008) | 0.58 in (2020) |
| December 18 | 69.1°F (2023) | 32.0°F (2016) | 0.81 in (2023) |
| December 19 | 73.9°F (1999) | 30.9°F (2006) | 1.34 in (2010) |
| December 20 | 71.1°F (1999) | 33.1°F (1998) | 0.92 in (2001) |
| December 21 | 73.0°F (1999) | 28.9°F (1998) | 0.59 in (2015) |
| December 22 | 64.9°F (2005) | 28.9°F (1998) | 0.52 in (2025) |
| December 23 | 69.1°F (2024) | 27.0°F (1998) | 0.85 in (2012) |
| December 24 | 68.0°F (2005) | 28.9°F (1998) | 0.95 in (2025) |
| December 25 | 64.9°F (2013) | 33.1°F (1998) | 0.99 in (2025) |
| December 26 | 64.0°F (2006) | 34.0°F (2008) | 0.59 in (2009) |
| December 27 | 66.0°F (1999) | 31.1°F (2015) | 1.54 in (2022) |
| December 28 | 71.1°F (2023) | 37.0°F (2003) | 1.15 in (2010) |
| December 29 | 70.0°F (2013) | 34.0°F (2015) | 1.60 in (2003) |
| December 30 | 63.0°F (2013) | 35.1°F (2010) | 0.80 in (2022) |
| December 31 | 63.0°F (2001) | 34.0°F (2007) | 4.34 in (2022) |