Weather on December 18
San Leandro, CA
55 Years of Data
About This Date
December 18th in San Leandro, CA typically brings cool winter weather, with average highs around 57°F and lows near 43°F. Over 53 years of records, the warmest December 18th was in 1994 (63°F average), while the coldest was 2016 (39°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 17% of December 18th dates historically, with the wettest December 18th recording 1.83" of rain. The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
Planning for December 18th in San Leandro, CA? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 55° | 48° | 52° | — | — |
| 2024 | 51° | 46° | 49° | — | — |
| 2023 | 61° | 45° | 53° | — | — |
| 2022 | 49° | 34° | 41° | — | — |
| 2021 | 46° | 35° | 41° | — | — |
| 2020 | 55° | 43° | 49° | — | — |
| 2019 | 52° | 43° | 47° | — | — |
| 2018 | 58° | 47° | 52° | — | — |
| 2017 | 56° | 43° | 49° | — | — |
| 2016coldest | 45° | 34° | 39° | — | — |
| 2015 | 54° | 46° | 50° | — | — |
| 2014 | 56° | 46° | 51° | — | — |
| 2013 | 59° | 44° | 52° | — | — |
| 2012 | 47° | 36° | 41° | — | — |
| 2011 | 48° | 43° | 45° | — | — |
| 2010 | 53° | 49° | 51° | — | — |
| 2009 | 57° | 47° | 52° | — | — |
| 2008 | 54° | 36° | 45° | 0.08" | — |
| 2007 | 50° | 43° | 46° | — | — |
| 2006 | 57° | 33° | 45° | — | — |
| 2005 | 57° | 47° | 52° | — | — |
| 2004 | 59° | 50° | 55° | — | — |
| 2003 | 56° | 43° | 49° | — | — |
| 2002 | 54° | 40° | 47° | — | — |
| 2001 | 57° | 41° | 49° | — | — |
| 2000 | 53° | 45° | 49° | — | — |
| 1999 | 56° | 46° | 51° | — | — |
| 1998 | 64° | 45° | 54° | — | — |
| 1997 | 57° | 44° | 51° | — | — |
| 1996 | 54° | 54° | 54° | — | — |
| 1995 | 57° | 55° | 56° | — | — |
| 1994warmest | 69° | 57° | 63° | — | — |
| 1993 | 48° | 41° | 45° | — | — |
| 1992 | 51° | 35° | 43° | — | — |
| 1989 | 55° | 40° | 47° | — | — |
| 1988 | 66° | 42° | 54° | — | — |
| 1987 | 58° | 38° | 48° | 0.03" | — |
| 1986 | 66° | 44° | 55° | 0.33" | — |
| 1985 | 62° | 38° | 50° | — | — |
| 1984 | 51° | 40° | 45° | — | — |
| 1983 | 62° | 47° | 54° | 0.03" | — |
| 1982 | 60° | 42° | 51° | — | — |
| 1981 | 65° | 48° | 56° | 0.1" | — |
| 1980 | 69° | 50° | 60° | — | — |
| 1979 | 67° | 43° | 55° | — | — |
| 1978 | 50° | 43° | 46° | 0.89" | — |
| 1977 | 56° | 40° | 48° | 1.83" | — |
| 1976 | 69° | 49° | 59° | — | — |
| 1975 | 62° | 35° | 49° | — | — |
| 1974 | 60° | 38° | 49° | — | — |
| 1973 | 59° | 37° | 48° | 0.08" | — |
| 1972 | 54° | 39° | 46° | 1.75" | — |
| 1971 | 56° | 32° | 44° | — | — |
San Leandro, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Leandro, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
San Leandro, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Leandro, CA
Most pleasant months in San Leandro, CA: August.