Weather on September 1
San Leandro, CA
55 Years of Data
Avg High
78°F
Avg Low
56°F
Warmest
2017
94°F avg
Coldest
1973
53°F avg
About This Date
September 1st in San Leandro, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 56°F. Over 53 years of records, the warmest September 1st was in 2017 (94°F average), while the coldest was 1973 (53°F) — a 41°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 September 1st in San Leandro, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 62° | 78° | — | — |
| 2024 | 74° | 54° | 64° | — | — |
| 2023 | 64° | 55° | 60° | — | — |
| 2022 | 93° | 65° | 79° | — | — |
| 2021 | 66° | 51° | 59° | — | — |
| 2020 | 66° | 53° | 60° | — | — |
| 2019 | 86° | 62° | 74° | — | — |
| 2018 | 71° | 52° | 61° | — | — |
| 2017warmest | 106° | 82° | 94° | — | — |
| 2016 | 63° | 54° | 58° | — | — |
| 2015 | 73° | 56° | 64° | — | — |
| 2014 | 88° | 57° | 72° | — | — |
| 2013 | 77° | 55° | 66° | — | — |
| 2012 | 69° | 50° | 60° | — | — |
| 2011 | 79° | 52° | 65° | — | — |
| 2010 | 90° | 65° | 77° | — | — |
| 2009 | 79° | 60° | 69° | — | — |
| 2008 | 88° | 54° | 71° | — | — |
| 2007 | 90° | 59° | 74° | — | — |
| 2006 | 74° | 57° | 65° | — | — |
| 2005 | 79° | 54° | 66° | — | — |
| 2004 | 74° | 54° | 64° | — | — |
| 2003 | 86° | 58° | 72° | — | — |
| 2002 | 99° | 66° | 82° | — | — |
| 2001 | 81° | 54° | 67° | — | — |
| 2000 | 58° | 55° | 56° | — | — |
| 1999 | 72° | 50° | 61° | — | — |
| 1998 | 87° | 65° | 76° | — | — |
| 1997 | 76° | 58° | 67° | — | — |
| 1996 | 75° | 54° | 64° | — | — |
| 1995 | 67° | 53° | 60° | — | — |
| 1994 | 65° | 53° | 59° | — | — |
| 1993 | 81° | 56° | 68° | — | — |
| 1992 | 70° | 55° | 62° | — | — |
| 1989 | 82° | 54° | 68° | — | — |
| 1988 | 74° | 54° | 64° | — | — |
| 1987 | 76° | 60° | 68° | — | — |
| 1986 | 80° | 54° | 67° | — | — |
| 1985 | 85° | 55° | 70° | — | — |
| 1984 | 80° | 54° | 67° | — | — |
| 1983 | 75° | 54° | 64° | — | — |
| 1982 | 84° | 53° | 69° | — | — |
| 1981 | 81° | 51° | 66° | — | — |
| 1980 | 74° | 53° | 63° | — | — |
| 1979 | 82° | 61° | 71° | — | — |
| 1978 | 78° | 56° | 67° | — | — |
| 1977 | 73° | 54° | 63° | — | — |
| 1976 | 88° | 53° | 70° | — | — |
| 1975 | 72° | 51° | 61° | — | — |
| 1974 | 69° | 54° | 61° | — | — |
| 1973coldest | 62° | 45° | 53° | — | — |
| 1972 | 80° | 52° | 66° | — | — |
| 1971 | 73° | 54° | 63° | — | — |
53 years of data from UPPER SAN LEANDRO FILTERS