Weather on September 20
Santa Clara, CA
55 Years of Data
Avg High
81°F
Avg Low
56°F
Warmest
2000
79°F avg
Coldest
1975
61°F avg
About This Date
September 20th 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 20th was in 2000 (79°F average), while the coldest was 1975 (61°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 20th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 20th in Santa Clara, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 63° | 71° | — | — |
| 2024 | 79° | 61° | 70° | — | — |
| 2023 | 80° | 60° | 70° | — | — |
| 2022 | 79° | 58° | 68° | — | — |
| 2021 | 89° | 55° | 72° | — | — |
| 2020 | 91° | 58° | 74° | — | — |
| 2019 | 84° | 55° | 70° | — | — |
| 2018 | 91° | 54° | 72° | — | — |
| 2017 | 76° | 57° | 66° | — | — |
| 2016 | 81° | 61° | 71° | — | — |
| 2015 | 95° | 59° | 77° | — | — |
| 2014 | 77° | 62° | 70° | — | — |
| 2013 | 76° | 56° | 66° | — | — |
| 2012 | 72° | 50° | 61° | — | — |
| 2011 | 94° | 63° | 78° | — | — |
| 2010 | 80° | 59° | 70° | — | — |
| 2009 | 90° | 59° | 74° | — | — |
| 2008 | 73° | 59° | 66° | — | — |
| 2007 | 72° | 51° | 61° | — | — |
| 2006 | 83° | 54° | 68° | — | — |
| 2005 | 72° | 56° | 64° | 0.05" | — |
| 2004 | 73° | 48° | 61° | — | — |
| 2003 | 92° | 58° | 75° | — | — |
| 2002 | 92° | 63° | 77° | — | — |
| 2001 | 74° | 54° | 64° | — | — |
| 2000warmest | 95° | 62° | 79° | — | — |
| 1999 | 74° | 56° | 65° | — | — |
| 1998 | 78° | 55° | 67° | — | — |
| 1997 | 90° | 56° | 73° | — | — |
| 1996 | 88° | 57° | 72° | — | — |
| 1995 | 82° | 60° | 71° | — | — |
| 1994 | 81° | 55° | 68° | — | — |
| 1993 | 82° | 56° | 69° | — | — |
| 1992 | 83° | 55° | 69° | — | — |
| 1991 | 81° | 58° | 69° | — | — |
| 1990 | 97° | 58° | 77° | — | — |
| 1989 | 77° | 57° | 67° | — | — |
| 1988 | 77° | 52° | 64° | — | — |
| 1987 | 87° | 54° | 70° | — | — |
| 1986 | 74° | 49° | 61° | — | — |
| 1985 | 78° | 53° | 66° | — | — |
| 1984 | 74° | 61° | 67° | — | — |
| 1983 | 92° | 59° | 75° | — | — |
| 1982 | 80° | 50° | 65° | — | — |
| 1981 | 78° | 54° | 66° | — | — |
| 1980 | 72° | 51° | 61° | — | — |
| 1979 | 84° | 56° | 70° | — | — |
| 1978 | 82° | 49° | 65° | — | — |
| 1977 | 75° | 53° | 64° | — | — |
| 1976 | 71° | 57° | 64° | — | — |
| 1975coldest | 75° | 47° | 61° | — | — |
| 1974 | 74° | 53° | 63° | — | — |
| 1973 | 77° | 60° | 69° | — | — |
| 1972 | 84° | 49° | 66° | — | — |
| 1971 | 82° | 53° | 68° | — | — |
55 years of data from SANTA CLARA UNIV