Weather on September 1
San Francisco, CA
55 Years of Data
About This Date
September 1st in San Francisco, CA typically brings pleasant fall weather, with average highs around 70°F and lows near 56°F. Over 55 years of records, the warmest September 1st was in 2017 (87°F average), while the coldest was 1980 (57°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 1st dates historically. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in San Francisco, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 57° | 64° | — | — |
| 2024 | 69° | 57° | 63° | — | — |
| 2023 | 64° | 57° | 61° | 0.02" | — |
| 2022 | 66° | 54° | 60° | — | — |
| 2021 | 64° | 56° | 60° | — | — |
| 2020 | 65° | 56° | 60° | — | — |
| 2019 | 70° | 60° | 65° | — | — |
| 2018 | 64° | 55° | 60° | — | — |
| 2017warmest | 106° | 69° | 87° | — | — |
| 2016 | 61° | 55° | 58° | — | — |
| 2015 | 70° | 61° | 65° | — | — |
| 2014 | 74° | 59° | 66° | — | — |
| 2013 | 67° | 56° | 61° | — | — |
| 2012 | 63° | 53° | 58° | — | — |
| 2011 | 71° | 54° | 62° | — | — |
| 2010 | 84° | 56° | 70° | — | — |
| 2009 | 68° | 57° | 63° | — | — |
| 2008 | 78° | 56° | 67° | — | — |
| 2007 | 78° | 58° | 68° | — | — |
| 2006 | 64° | 54° | 59° | — | — |
| 2005 | 66° | 56° | 61° | — | — |
| 2004 | 66° | 60° | 63° | — | — |
| 2003 | 69° | 53° | 61° | — | — |
| 2002 | 83° | 51° | 67° | — | — |
| 2001 | 66° | 54° | 60° | — | — |
| 2000 | 62° | 59° | 61° | 0.14" | — |
| 1999 | 70° | 52° | 61° | — | — |
| 1998 | 64° | 53° | 59° | — | — |
| 1997 | 73° | 59° | 66° | — | — |
| 1996 | 66° | 56° | 61° | — | — |
| 1995 | 67° | 54° | 60° | — | — |
| 1994 | 66° | 55° | 61° | — | — |
| 1993 | 78° | 60° | 69° | — | — |
| 1992 | 71° | 58° | 64° | — | — |
| 1991 | 74° | 57° | 65° | — | — |
| 1990 | 71° | 58° | 64° | — | — |
| 1989 | 71° | 55° | 63° | — | — |
| 1988 | 67° | 55° | 61° | — | — |
| 1987 | 70° | 59° | 64° | — | — |
| 1986 | 72° | 56° | 64° | — | — |
| 1985 | 70° | 60° | 65° | — | — |
| 1984 | 89° | 57° | 73° | — | — |
| 1983 | 76° | 55° | 65° | — | — |
| 1982 | 71° | 51° | 61° | — | — |
| 1981 | 63° | 51° | 57° | — | — |
| 1980coldest | 61° | 53° | 57° | — | — |
| 1979 | 73° | 60° | 67° | — | — |
| 1978 | 78° | 58° | 68° | — | — |
| 1977 | 63° | 54° | 58° | — | — |
| 1976 | 65° | 52° | 58° | — | — |
| 1975 | 69° | 53° | 61° | — | — |
| 1974 | 64° | 53° | 59° | — | — |
| 1973 | 68° | 53° | 61° | — | — |
| 1972 | 62° | 54° | 58° | — | — |
| 1971 | 70° | 60° | 65° | — | — |
San Francisco, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Francisco, CA Monthly Precipitation
Average rainfall per month, in inches.
San Francisco, 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 Francisco, CA
Most pleasant months in San Francisco, CA: June, July, August, September, October.
What to expect on September 1st
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 1st outlook →