Weather on October 21
San Leandro, CA
55 Years of Data
About This Date
October 21st in San Leandro, CA typically brings pleasant fall weather, with average highs around 71°F and lows near 52°F. Over 53 years of records, the warmest October 21st was in 2020 (77°F average), while the coldest was 2001 (51°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 6% of October 21st dates historically, with the wettest October 21st recording 1.88" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in San Leandro, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 53° | 66° | — | — |
| 2024 | 71° | 53° | 62° | — | — |
| 2023 | 63° | 52° | 57° | — | — |
| 2022 | 65° | 51° | 58° | — | — |
| 2021 | 67° | 58° | 62° | — | — |
| 2020warmest | 87° | 66° | 77° | — | — |
| 2019 | 85° | 56° | 70° | — | — |
| 2018 | 67° | 49° | 58° | — | — |
| 2017 | 68° | 46° | 57° | — | — |
| 2016 | 76° | 57° | 66° | — | — |
| 2015 | 79° | 59° | 69° | — | — |
| 2014 | 68° | 50° | 59° | — | — |
| 2013 | 71° | 45° | 58° | — | — |
| 2012 | 59° | 47° | 53° | — | — |
| 2011 | 72° | 51° | 61° | — | — |
| 2010 | 61° | 51° | 56° | — | — |
| 2009 | 67° | 51° | 59° | — | — |
| 2008 | 79° | 50° | 64° | — | — |
| 2007 | 69° | 48° | 59° | — | — |
| 2006 | 83° | 54° | 68° | — | — |
| 2005 | 72° | 53° | 62° | — | — |
| 2004 | 63° | 46° | 54° | — | — |
| 2003 | 88° | 53° | 70° | — | — |
| 2002 | 71° | 50° | 61° | — | — |
| 2001coldest | 53° | 49° | 51° | — | — |
| 2000 | 72° | 47° | 59° | — | — |
| 1999 | 83° | 65° | 74° | — | — |
| 1998 | 85° | 60° | 72° | — | — |
| 1997 | 68° | 50° | 59° | — | — |
| 1996 | 67° | 52° | 59° | — | — |
| 1995 | 70° | 53° | 61° | — | — |
| 1994 | 74° | 55° | 64° | — | — |
| 1993 | 67° | 53° | 60° | — | — |
| 1992 | 68° | 54° | 61° | — | — |
| 1989 | 67° | 54° | 60° | 0.05" | — |
| 1988 | 82° | 50° | 66° | — | — |
| 1987 | 66° | 53° | 60° | — | — |
| 1986 | 65° | 53° | 59° | — | — |
| 1985 | 63° | 52° | 57° | 1.88" | — |
| 1984 | 66° | 46° | 56° | — | — |
| 1983 | 78° | 52° | 65° | — | — |
| 1982 | 73° | 58° | 65° | — | — |
| 1981 | 68° | 49° | 58° | — | — |
| 1980 | 76° | 48° | 62° | — | — |
| 1979 | 66° | 48° | 57° | 0.03" | — |
| 1978 | 72° | 61° | 66° | — | — |
| 1977 | 62° | 47° | 54° | — | — |
| 1976 | 85° | 54° | 69° | — | — |
| 1975 | 80° | 48° | 64° | — | — |
| 1974 | 70° | 47° | 58° | — | — |
| 1973 | 73° | 50° | 62° | — | — |
| 1972 | 60° | 50° | 55° | — | — |
| 1971 | 64° | 43° | 53° | — | — |
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.