Weather on September 21
Berkeley, CA
55 Years of Data
About This Date
September 21st in Berkeley, CA typically brings pleasant fall weather, with average highs around 75°F and lows near 55°F. Over 56 years of records, the warmest September 21st was in 2015 (81°F average), while the coldest was 1974 (58°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 21st dates historically, with the wettest September 21st recording 0.61" of rain. 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 21st in Berkeley, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 64° | 57° | 61° | — | — |
| 2025 | 76° | 59° | 67° | — | — |
| 2024 | 68° | 57° | 63° | — | — |
| 2023 | 72° | 54° | 63° | — | — |
| 2022 | 80° | 56° | 68° | — | — |
| 2021 | 89° | 62° | 76° | — | — |
| 2020 | 84° | 57° | 71° | — | — |
| 2019 | 83° | 55° | 69° | — | — |
| 2018 | 86° | 54° | 70° | — | — |
| 2017 | 72° | 49° | 60° | — | — |
| 2016 | 78° | 52° | 65° | — | — |
| 2015warmest | 97° | 65° | 81° | — | — |
| 2014 | 68° | 60° | 64° | — | — |
| 2013 | 73° | 59° | 66° | 0.61" | — |
| 2012 | 75° | 48° | 62° | — | — |
| 2011 | 93° | 52° | 72° | — | — |
| 2010 | 75° | 53° | 64° | 0.03" | — |
| 2009 | 82° | 55° | 69° | — | — |
| 2008 | 72° | 52° | 62° | — | — |
| 2007 | 68° | 55° | 62° | — | — |
| 2006 | 84° | 53° | 69° | — | — |
| 2005 | 64° | 53° | 59° | — | — |
| 2004 | 73° | 53° | 63° | — | — |
| 2003 | 89° | 58° | 73° | — | — |
| 2002 | 90° | 52° | 71° | — | — |
| 2001 | 67° | 52° | 59° | — | — |
| 2000 | 76° | 58° | 67° | — | — |
| 1999 | 69° | 53° | 61° | — | — |
| 1998 | 73° | 56° | 64° | — | — |
| 1997 | 74° | 60° | 67° | — | — |
| 1996 | 76° | 56° | 66° | — | — |
| 1995 | 66° | 56° | 61° | — | — |
| 1994 | 66° | — | — | — | — |
| 1993 | 67° | 56° | 61° | — | — |
| 1992 | 72° | — | — | — | — |
| 1991 | 74° | 57° | 65° | — | — |
| 1990 | 71° | 59° | 65° | — | — |
| 1989 | 79° | 54° | 66° | — | — |
| 1988 | 65° | 53° | 59° | — | — |
| 1987 | 73° | 54° | 63° | — | — |
| 1986 | 67° | 53° | 60° | — | — |
| 1985 | 73° | 50° | 62° | — | — |
| 1984 | 76° | 53° | 64° | — | — |
| 1983 | 83° | 63° | 73° | 0.01" | — |
| 1982 | 81° | 58° | 69° | — | — |
| 1981 | 79° | 56° | 67° | — | — |
| 1980 | 74° | 53° | 63° | — | — |
| 1979 | 71° | 57° | 64° | — | — |
| 1978 | 70° | 52° | 61° | — | — |
| 1977 | 75° | 55° | 65° | — | — |
| 1976 | 68° | 53° | 61° | — | — |
| 1975 | 65° | 54° | 59° | — | — |
| 1974coldest | 63° | 54° | 58° | — | — |
| 1973 | 70° | 56° | 63° | — | — |
| 1972 | 78° | 58° | 68° | — | — |
| 1971 | 68° | 56° | 62° | — | — |
Berkeley, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Berkeley, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Berkeley, 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 Berkeley, CA
Most pleasant months in Berkeley, CA: April, May, June, July, August, September, October.
What to expect on September 21st
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 21st outlook →