Weather on September 30
Hayward, CA
55 Years of Data
Avg High
76°F
Avg Low
55°F
Warmest
1978
78°F avg
Coldest
1996
53°F avg
About This Date
September 30th in Hayward, CA typically brings pleasant fall weather, with average highs around 76°F and lows near 55°F. Over 53 years of records, the warmest September 30th was in 1978 (78°F average), while the coldest was 1996 (53°F) — a 25°F range across recorded history. Precipitation has occurred on 8% of recorded September 30th dates, with snow falling 2% of the time (heaviest snowfall: 4.5"). 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 30th in Hayward, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 63° | 70° | — | — |
| 2024 | 92° | 56° | 74° | — | — |
| 2023 | 67° | 58° | 62° | 0.05" | — |
| 2022 | 85° | 57° | 71° | — | — |
| 2021 | 85° | 53° | 69° | — | — |
| 2020 | 87° | 61° | 74° | — | — |
| 2019 | 65° | 50° | 57° | — | — |
| 2018 | 76° | 59° | 67° | — | — |
| 2017 | 75° | 59° | 67° | — | — |
| 2016 | 66° | 55° | 61° | — | — |
| 2015 | 64° | 58° | 61° | 0.05" | — |
| 2014 | 75° | 60° | 68° | — | — |
| 2013 | 71° | 57° | 64° | — | — |
| 2012 | 89° | 54° | 71° | — | — |
| 2011 | 74° | 63° | 68° | — | — |
| 2010 | 75° | 56° | 65° | — | — |
| 2009 | 72° | 49° | 60° | — | — |
| 2008 | 76° | 57° | 66° | — | — |
| 2007 | 73° | 49° | 61° | — | — |
| 2006 | 64° | 57° | 61° | — | — |
| 2005 | 86° | 57° | 72° | — | — |
| 2004 | 68° | 56° | 62° | — | — |
| 2003 | 74° | 55° | 64° | — | — |
| 2002 | 69° | 56° | 62° | — | — |
| 2001 | 91° | 56° | 73° | — | — |
| 2000 | 87° | 58° | 72° | — | — |
| 1999 | 87° | 63° | 75° | — | — |
| 1998 | 65° | 57° | 61° | — | — |
| 1997 | 74° | 55° | 64° | — | — |
| 1996coldest | 56° | 51° | 53° | — | — |
| 1995 | 77° | 58° | 67° | — | — |
| 1994 | 74° | 54° | 64° | — | — |
| 1993 | 78° | 55° | 67° | — | — |
| 1992 | 76° | 57° | 66° | — | — |
| 1989 | 73° | 55° | 64° | — | — |
| 1988 | 93° | 55° | 74° | — | — |
| 1987 | 87° | 54° | 70° | — | — |
| 1986 | 77° | 56° | 66° | — | — |
| 1985 | 65° | 50° | 57° | — | — |
| 1984 | 84° | 58° | 71° | — | — |
| 1983 | 67° | 57° | 62° | 1.14" | 4.5" |
| 1982 | 75° | 53° | 64° | — | — |
| 1981 | 73° | 50° | 62° | — | — |
| 1980 | 88° | 56° | 72° | — | — |
| 1979 | 74° | 55° | 64° | — | — |
| 1978warmest | 95° | 60° | 78° | — | — |
| 1977 | 63° | 50° | 56° | — | — |
| 1976 | 76° | 60° | 68° | — | — |
| 1975 | 72° | 48° | 60° | — | — |
| 1974 | 78° | 53° | 66° | — | — |
| 1973 | 78° | 49° | 63° | — | — |
| 1972 | 84° | 53° | 69° | — | — |
| 1971 | 65° | 44° | 54° | 0.38" | — |
53 years of data from HAYWARD AIR TERMINAL