Weather on September 23
Santa Clara, CA
55 Years of Data
Avg High
81°F
Avg Low
56°F
Warmest
2025
79°F avg
Coldest
1972
62°F avg
About This Date
September 23rd in Santa Clara, CA typically brings warm fall weather, with average highs around 81°F and lows near 56°F — a 25°F daily swing. Over 55 years of records, the warmest September 23rd was in 2025 (79°F average), while the coldest was 1972 (62°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 23rd dates historically. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Santa Clara, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 95° | 63° | 79° | — | — |
| 2024 | 95° | 58° | 76° | — | — |
| 2023 | 76° | 54° | 65° | — | — |
| 2022 | 87° | 57° | 72° | — | — |
| 2021 | 89° | 57° | 73° | — | — |
| 2020 | 82° | 57° | 70° | — | — |
| 2019 | 84° | 59° | 72° | — | — |
| 2018 | 81° | 53° | 67° | — | — |
| 2017 | 81° | 51° | 66° | — | — |
| 2016 | 80° | 52° | 66° | — | — |
| 2015 | 82° | 53° | 68° | — | — |
| 2014 | 78° | 59° | 69° | — | — |
| 2013 | 80° | 54° | 67° | — | — |
| 2012 | 83° | 53° | 68° | — | — |
| 2011 | 89° | 61° | 75° | — | — |
| 2010 | 79° | 50° | 64° | — | — |
| 2009 | 79° | 60° | 69° | — | — |
| 2008 | 90° | 54° | 72° | — | — |
| 2007 | 71° | 53° | 62° | — | — |
| 2006 | 83° | 54° | 68° | — | — |
| 2005 | 72° | 54° | 63° | — | — |
| 2004 | 88° | — | — | — | — |
| 2003 | 81° | 60° | 70° | — | — |
| 2002 | 92° | 59° | 75° | — | — |
| 2001 | 81° | 56° | 68° | — | — |
| 2000 | 78° | 55° | 67° | — | — |
| 1999 | 79° | 58° | 68° | — | — |
| 1998 | 76° | 56° | 66° | — | — |
| 1997 | 96° | 59° | 78° | — | — |
| 1996 | 79° | 53° | 66° | — | — |
| 1995 | 76° | 60° | 68° | — | — |
| 1994 | 79° | 57° | 68° | 0.18" | — |
| 1993 | 81° | 54° | 67° | — | — |
| 1992 | 82° | 63° | 72° | — | — |
| 1991 | 87° | 58° | 72° | — | — |
| 1990 | 79° | 59° | 69° | — | — |
| 1989 | 76° | 61° | 68° | — | — |
| 1988 | 81° | 53° | 67° | — | — |
| 1987 | 73° | 59° | 66° | — | — |
| 1986 | 72° | 56° | 64° | — | — |
| 1985 | 79° | 56° | 67° | — | — |
| 1984 | 75° | 53° | 64° | — | — |
| 1983 | 77° | 62° | 70° | — | — |
| 1982 | 78° | 57° | 68° | 0.3" | — |
| 1981 | 80° | 50° | 65° | — | — |
| 1980 | 90° | 54° | 72° | — | — |
| 1979 | 82° | 54° | 68° | — | — |
| 1978 | 92° | 56° | 74° | — | — |
| 1977 | 77° | 50° | 64° | — | — |
| 1976 | 78° | 51° | 65° | — | — |
| 1975 | 83° | 44° | 63° | — | — |
| 1974 | 75° | 53° | 64° | — | — |
| 1973 | 74° | 59° | 66° | — | — |
| 1972coldest | 79° | 46° | 62° | — | — |
| 1971 | 74° | 57° | 65° | — | — |
55 years of data from SANTA CLARA UNIV