Weather on September 23
San Leandro, CA
55 Years of Data
About This Date
September 23rd in San Leandro, CA typically brings warm fall weather, with average highs around 80°F and lows near 56°F. Over 54 years of records, the warmest September 23rd was in 2008 (140°F average), while the coldest was 1996 (57°F) — a 83°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 23rd dates historically. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in San Leandro, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 87° | 52° | 69° | — | — |
| 2025 | 96° | 67° | 81° | — | — |
| 2024 | 95° | 65° | 80° | — | — |
| 2023 | 69° | 52° | 60° | — | — |
| 2022 | 87° | 58° | 72° | — | — |
| 2021 | 92° | 58° | 75° | — | — |
| 2020 | 78° | 55° | 67° | — | — |
| 2019 | 85° | 56° | 70° | — | — |
| 2018 | 74° | 55° | 64° | — | — |
| 2017 | 77° | 55° | 66° | — | — |
| 2016 | 71° | 51° | 61° | — | — |
| 2015 | 82° | 51° | 67° | — | — |
| 2014 | 76° | 57° | 66° | — | — |
| 2013 | 76° | 55° | 65° | — | — |
| 2012 | 82° | 53° | 68° | — | — |
| 2011 | 89° | 66° | 78° | — | — |
| 2010 | 77° | 50° | 64° | — | — |
| 2009 | 72° | 57° | 64° | — | — |
| 2008warmest | 140° | 140° | 140° | — | — |
| 2007 | 66° | 53° | 60° | — | — |
| 2006 | 85° | 57° | 71° | — | — |
| 2005 | 64° | 50° | 57° | — | — |
| 2004 | 89° | 62° | 76° | — | — |
| 2003 | 75° | 56° | 65° | — | — |
| 2002 | 94° | 65° | 79° | — | — |
| 2001 | 69° | 50° | 60° | — | — |
| 2000 | 77° | 52° | 64° | — | — |
| 1999 | 75° | 54° | 64° | — | — |
| 1998 | 70° | 52° | 61° | — | — |
| 1997 | 96° | 66° | 81° | — | — |
| 1996coldest | 66° | 49° | 57° | — | — |
| 1995 | 71° | 54° | 62° | — | — |
| 1994 | 76° | 55° | 65° | — | — |
| 1993 | 78° | 49° | 63° | — | — |
| 1992 | 76° | 56° | 66° | — | — |
| 1989 | 90° | 54° | 72° | — | — |
| 1988 | 75° | 47° | 61° | — | — |
| 1987 | 73° | 55° | 64° | — | — |
| 1986 | 75° | 54° | 64° | — | — |
| 1985 | 87° | 54° | 70° | — | — |
| 1984 | 82° | 52° | 67° | — | — |
| 1983 | 70° | 63° | 66° | — | — |
| 1982 | 75° | 54° | 64° | — | — |
| 1981 | 83° | 53° | 68° | — | — |
| 1980 | 86° | 53° | 70° | — | — |
| 1979 | 75° | 57° | 66° | — | — |
| 1978 | 89° | 49° | 69° | — | — |
| 1977 | 77° | 52° | 64° | — | — |
| 1976 | 70° | 52° | 61° | — | — |
| 1975 | 70° | 48° | 59° | — | — |
| 1974 | 67° | 51° | 59° | — | — |
| 1973 | 73° | 54° | 63° | 0.09" | — |
| 1972 | 73° | 46° | 60° | — | — |
| 1971 | 74° | 51° | 62° | — | — |
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: April, May, June, July, August, September, October.
What to expect on September 23rd
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 23rd outlook →