Weather on September 11
Hayward, CA
55 Years of Data
About This Date
September 11th in Hayward, CA typically brings pleasant fall weather, with average highs around 76°F and lows near 56°F. Over 53 years of records, the warmest September 11th was in 1979 (78°F average), while the coldest was 1989 (53°F) — a 25°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for September 11th in Hayward, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 62° | 67° | — | — |
| 2024 | 74° | 60° | 67° | — | — |
| 2023 | 78° | 56° | 67° | — | — |
| 2022 | 82° | 65° | 73° | — | — |
| 2021 | 75° | 56° | 65° | — | — |
| 2020 | 77° | 58° | 67° | — | — |
| 2019 | 83° | 57° | 70° | — | — |
| 2018 | 72° | 55° | 63° | — | — |
| 2017 | 89° | 67° | 78° | — | — |
| 2016 | 71° | 59° | 65° | — | — |
| 2015 | 81° | 59° | 70° | — | — |
| 2014 | 87° | 60° | 74° | — | — |
| 2013 | 74° | 61° | 67° | — | — |
| 2012 | 75° | 53° | 64° | — | — |
| 2011 | 76° | 60° | 68° | — | — |
| 2010 | 85° | 57° | 71° | — | — |
| 2009 | 86° | 59° | 73° | — | — |
| 2008 | 74° | 58° | 66° | — | — |
| 2007 | 70° | 60° | 65° | — | — |
| 2006 | 83° | 55° | 69° | — | — |
| 2005 | 65° | 55° | 60° | — | — |
| 2004 | 82° | 59° | 71° | — | — |
| 2003 | 91° | 61° | 76° | — | — |
| 2002 | 78° | 56° | 67° | — | — |
| 2001 | 74° | 59° | 66° | — | — |
| 2000 | 80° | 54° | 67° | — | — |
| 1999 | 70° | 59° | 64° | — | — |
| 1998 | 84° | 60° | 72° | — | — |
| 1997 | 77° | 59° | 68° | — | — |
| 1996 | 62° | 52° | 57° | — | — |
| 1995 | 77° | 54° | 65° | — | — |
| 1994 | 67° | 53° | 60° | — | — |
| 1993 | 63° | 52° | 57° | — | — |
| 1992 | 72° | 55° | 63° | — | — |
| 1989coldest | 60° | 47° | 53° | — | — |
| 1988 | 72° | 52° | 62° | — | — |
| 1987 | 72° | 56° | 64° | — | — |
| 1986 | 84° | 50° | 67° | — | — |
| 1985 | 68° | 52° | 60° | — | — |
| 1984 | 75° | 55° | 65° | — | — |
| 1983 | 89° | 55° | 72° | — | — |
| 1982 | 78° | 57° | 68° | — | — |
| 1981 | 76° | 56° | 66° | — | — |
| 1980 | 68° | 56° | 62° | — | — |
| 1979warmest | 98° | 58° | 78° | — | — |
| 1978 | 73° | 52° | 62° | — | — |
| 1977 | 69° | 53° | 61° | — | — |
| 1976 | 76° | 57° | 66° | — | — |
| 1975 | 66° | 52° | 59° | — | — |
| 1974 | 85° | 55° | 70° | — | — |
| 1973 | 70° | 52° | 61° | — | — |
| 1972 | 71° | 51° | 61° | — | — |
| 1971 | 81° | 53° | 67° | — | — |
Hayward, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Hayward, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Hayward, 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 Hayward, CA
Most pleasant months in Hayward, CA: August.