Weather on December 15
San Leandro, CA
55 Years of Data
Avg High
56°F
Avg Low
43°F
Warmest
1983
59°F avg
Coldest
1971
41°F avg
About This Date
December 15th in San Leandro, CA typically brings cool winter weather, with average highs around 56°F and lows near 43°F. Over 53 years of records, the warmest December 15th was in 1983 (59°F average), while the coldest was 1971 (41°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 15th dates historically, with the wettest December 15th recording 4.17" of rain. The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in San Leandro, CA? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 55° | 36° | 45° | — | — |
| 2024 | 47° | 43° | 45° | — | — |
| 2023 | 56° | 47° | 51° | — | — |
| 2022 | 52° | 39° | 45° | — | — |
| 2021 | 47° | 39° | 43° | — | — |
| 2020 | 54° | 46° | 50° | — | — |
| 2019 | 52° | 40° | 46° | — | — |
| 2018 | 58° | 50° | 54° | — | — |
| 2017 | 58° | 47° | 52° | — | — |
| 2016 | 55° | 45° | 50° | — | — |
| 2015 | 50° | 39° | 45° | — | — |
| 2014 | 49° | 45° | 47° | — | — |
| 2013 | 57° | 44° | 51° | — | — |
| 2012 | 45° | 39° | 42° | — | — |
| 2011 | 46° | 42° | 44° | — | — |
| 2010 | 50° | 43° | 46° | — | — |
| 2009 | 54° | 46° | 50° | — | — |
| 2008 | 52° | 40° | 46° | 0.43" | — |
| 2007 | 56° | 39° | 47° | — | — |
| 2006 | 58° | 48° | 53° | 0.08" | — |
| 2005 | 59° | 46° | 53° | — | — |
| 2004 | 58° | 51° | 54° | — | — |
| 2003 | 52° | 38° | 45° | — | — |
| 2002 | 53° | 50° | 52° | — | — |
| 2001 | 53° | 41° | 47° | — | — |
| 2000 | 61° | 49° | 55° | — | — |
| 1999 | 57° | 41° | 49° | — | — |
| 1998 | 59° | 47° | 53° | — | — |
| 1997 | 55° | 41° | 48° | — | — |
| 1996 | 54° | 49° | 51° | — | — |
| 1995 | 59° | 54° | 56° | — | — |
| 1994 | 61° | 57° | 59° | — | — |
| 1993 | 53° | 41° | 47° | — | — |
| 1992 | 56° | 39° | 47° | — | — |
| 1989 | 66° | 42° | 54° | — | — |
| 1988 | 53° | 49° | 51° | — | — |
| 1987 | 53° | 39° | 46° | — | — |
| 1986 | 48° | 46° | 47° | — | — |
| 1985 | 57° | 40° | 48° | — | — |
| 1984 | 61° | 41° | 51° | 0.58" | — |
| 1983warmest | 65° | 54° | 59° | — | — |
| 1982 | 52° | 40° | 46° | — | — |
| 1981 | 66° | 43° | 54° | — | — |
| 1980 | 66° | 42° | 54° | — | — |
| 1979 | 63° | 44° | 53° | — | — |
| 1978 | 63° | 42° | 52° | — | — |
| 1977 | 60° | 43° | 51° | 4.17" | — |
| 1976 | 66° | 46° | 56° | — | — |
| 1975 | 55° | 38° | 46° | — | — |
| 1974 | 53° | 45° | 49° | 0.08" | — |
| 1973 | 57° | 39° | 48° | — | — |
| 1972 | 58° | 26° | 42° | — | — |
| 1971coldest | 48° | 33° | 41° | 0.2" | — |
53 years of data from UPPER SAN LEANDRO FILTERS