Weather on December 20
San Leandro, CA
55 Years of Data
Avg High
55°F
Avg Low
43°F
Warmest
1995
63°F avg
Coldest
1993
37°F avg
About This Date
December 20th in San Leandro, CA typically brings cool winter weather, with average highs around 55°F and lows near 43°F. Over 53 years of records, the warmest December 20th was in 1995 (63°F average), while the coldest was 1993 (37°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 20th dates historically, with the wettest December 20th recording 7.11" of rain. The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for December 20th in San Leandro, CA? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 55° | 57° | — | — |
| 2024 | 48° | 41° | 45° | — | — |
| 2023 | 55° | 49° | 52° | — | — |
| 2022 | 49° | 37° | 43° | — | — |
| 2021 | 49° | 38° | 43° | — | — |
| 2020 | 55° | 45° | 50° | — | — |
| 2019 | 58° | 47° | 52° | — | — |
| 2018 | 50° | 43° | 46° | — | — |
| 2017 | 50° | 40° | 45° | — | — |
| 2016 | 53° | 40° | 46° | — | — |
| 2015 | 48° | 40° | 44° | — | — |
| 2014 | 55° | 51° | 53° | — | — |
| 2013 | 56° | 42° | 49° | — | — |
| 2012 | 53° | 41° | 47° | — | — |
| 2011 | 53° | 44° | 49° | — | — |
| 2010 | 46° | 44° | 45° | — | — |
| 2009 | 60° | 42° | 51° | — | — |
| 2008 | 51° | 35° | 43° | — | — |
| 2007 | 50° | 37° | 44° | — | — |
| 2006 | 51° | 36° | 43° | — | — |
| 2005 | 63° | 55° | 59° | — | — |
| 2004 | 55° | 42° | 49° | — | — |
| 2003 | 56° | 47° | 51° | — | — |
| 2002 | 50° | 42° | 46° | — | — |
| 2001 | 47° | 43° | 45° | — | — |
| 2000 | 60° | 49° | 54° | — | — |
| 1999 | 67° | 55° | 61° | — | — |
| 1998 | 42° | 32° | 37° | — | — |
| 1997 | 53° | 44° | 49° | — | — |
| 1996 | 48° | 40° | 44° | — | — |
| 1995warmest | 68° | 58° | 63° | — | — |
| 1994 | 60° | 54° | 57° | — | — |
| 1993coldest | 43° | 32° | 37° | — | — |
| 1992 | 49° | 41° | 45° | — | — |
| 1989 | 57° | 37° | 47° | — | — |
| 1988 | 52° | 47° | 49° | 0.94" | — |
| 1987 | 61° | 38° | 49° | — | — |
| 1986 | 57° | 43° | 50° | 0.51" | — |
| 1985 | 62° | 38° | 50° | — | — |
| 1984 | 53° | 38° | 45° | — | — |
| 1983 | 56° | 41° | 48° | — | — |
| 1982 | 59° | 48° | 54° | 0.08" | — |
| 1981 | 62° | 52° | 57° | 7.11" | — |
| 1980 | 61° | 49° | 55° | — | — |
| 1979 | 56° | 50° | 53° | 0.64" | — |
| 1978 | 58° | 36° | 47° | — | — |
| 1977 | 54° | 39° | 46° | — | — |
| 1976 | 69° | 46° | 58° | — | — |
| 1975 | 58° | 37° | 47° | — | — |
| 1974 | 59° | 37° | 48° | — | — |
| 1973 | 62° | 37° | 50° | — | — |
| 1972 | 61° | 50° | 55° | 0.08" | — |
| 1971 | 57° | 34° | 45° | — | — |
53 years of data from UPPER SAN LEANDRO FILTERS