Weather on September 20
San Jose, CA
55 Years of Data
About This Date
September 20th in San Jose, CA typically brings warm fall weather, with average highs around 81°F and lows near 56°F — a 25°F daily swing. Over 56 years of records, the warmest September 20th was in 2000 (79°F average), while the coldest was 1980 (61°F) — a 18°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 San Jose, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 68° | 58° | 63° | — | — |
| 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 | 85° | 55° | 70° | — | — |
| 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 | 76° | 53° | 64° | — | — |
| 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° | — | — |
| 1980coldest | 72° | 51° | 61° | — | — |
| 1979 | 84° | 56° | 70° | — | — |
| 1978 | 82° | 49° | 65° | — | — |
| 1977 | 75° | 53° | 64° | — | — |
| 1976 | 71° | 57° | 64° | — | — |
| 1975 | 75° | 52° | 63° | — | — |
| 1974 | 74° | 55° | 64° | — | — |
| 1973 | 77° | 61° | 69° | — | — |
| 1972 | 81° | 48° | 64° | — | — |
| 1971 | 83° | 54° | 68° | — | — |
San Jose, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Jose, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
San Jose, 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 Jose, CA
Most pleasant months in San Jose, CA: March, April, May, June, July, August, September, October, November.
What to expect on September 20th
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 20th outlook →