Weather on June 21
San Leandro, CA
55 Years of Data
Avg High
74°F
Avg Low
52°F
Warmest
2022
83°F avg
Coldest
2002
49°F avg
About This Date
June 21st in San Leandro, CA typically brings pleasant summer weather, with average highs around 74°F and lows near 52°F. Over 52 years of records, the warmest June 21st was in 2022 (83°F average), while the coldest was 2002 (49°F) — a 34°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in San Leandro, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 48° | 60° | — | — |
| 2024 | 76° | 48° | 62° | — | — |
| 2023 | 69° | 48° | 59° | — | — |
| 2022warmest | 100° | 66° | 83° | — | — |
| 2021 | 69° | 51° | 60° | — | — |
| 2020 | 74° | 53° | 63° | — | — |
| 2019 | 71° | 51° | 61° | — | — |
| 2018 | 74° | 48° | 61° | — | — |
| 2017 | 88° | 52° | 70° | — | — |
| 2016 | 85° | 51° | 68° | — | — |
| 2015 | 66° | 50° | 58° | — | — |
| 2014 | 61° | 49° | 55° | — | — |
| 2013 | 73° | 48° | 61° | — | — |
| 2012 | 54° | 47° | 50° | — | — |
| 2011 | 91° | 67° | 79° | — | — |
| 2010 | 75° | 51° | 63° | — | — |
| 2009 | 70° | 53° | 61° | — | — |
| 2008 | 92° | 59° | 75° | — | — |
| 2007 | 83° | 49° | 66° | — | — |
| 2006 | 91° | 60° | 76° | — | — |
| 2005 | 69° | 52° | 60° | — | — |
| 2004 | 66° | 50° | 58° | — | — |
| 2003 | 68° | 49° | 58° | — | — |
| 2002coldest | 52° | 47° | 49° | — | — |
| 2001 | 90° | 63° | 76° | — | — |
| 2000 | 84° | 55° | 70° | — | — |
| 1999 | 68° | 50° | 59° | — | — |
| 1998 | 66° | 53° | 60° | — | — |
| 1997 | 71° | 50° | 61° | — | — |
| 1996 | 61° | 48° | 54° | — | — |
| 1995 | 79° | 61° | 70° | — | — |
| 1994 | 69° | 50° | 60° | — | — |
| 1993 | 66° | 51° | 59° | — | — |
| 1989 | 87° | 51° | 69° | — | — |
| 1988 | 68° | 55° | 62° | — | — |
| 1987 | 69° | 54° | 61° | — | — |
| 1986 | 76° | 54° | 65° | — | — |
| 1985 | 72° | 56° | 64° | — | — |
| 1984 | 70° | 52° | 61° | — | — |
| 1983 | 74° | 50° | 62° | — | — |
| 1982 | 64° | 54° | 59° | — | — |
| 1981 | 90° | 64° | 77° | — | — |
| 1980 | 65° | 52° | 58° | — | — |
| 1979 | 69° | 52° | 60° | — | — |
| 1978 | 64° | 52° | 58° | — | — |
| 1977 | 78° | 49° | 63° | — | — |
| 1976 | 64° | 48° | 56° | — | — |
| 1975 | 70° | 47° | 58° | — | — |
| 1974 | 78° | 50° | 64° | — | — |
| 1973 | 100° | 56° | 78° | — | — |
| 1972 | 72° | 51° | 61° | — | — |
| 1971 | 78° | 52° | 65° | — | — |
52 years of data from UPPER SAN LEANDRO FILTERS