Weather on September 28
Hayward, CA
55 Years of Data
Avg High
75°F
Avg Low
57°F
Warmest
2010
81°F avg
Coldest
1971
57°F avg
About This Date
September 28th in Hayward, CA typically brings pleasant fall weather, with average highs around 75°F and lows near 57°F. Over 53 years of records, the warmest September 28th was in 2010 (81°F average), while the coldest was 1971 (57°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 8% of September 28th dates historically, with the wettest September 28th recording 0.51" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for September 28th in Hayward, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 64° | 68° | — | — |
| 2024 | 74° | 60° | 67° | — | — |
| 2023 | 76° | 58° | 67° | — | — |
| 2022 | 72° | 59° | 65° | — | — |
| 2021 | 74° | 55° | 64° | — | — |
| 2020 | 97° | 64° | 80° | — | — |
| 2019 | 68° | 54° | 61° | — | — |
| 2018 | 68° | 58° | 63° | — | — |
| 2017 | 85° | 59° | 72° | — | — |
| 2016 | 75° | 56° | 65° | — | — |
| 2015 | 73° | 54° | 63° | — | — |
| 2014 | 73° | 60° | 67° | — | — |
| 2013 | 80° | 51° | 66° | — | — |
| 2012 | 67° | 54° | 60° | — | — |
| 2011 | 92° | 62° | 77° | — | — |
| 2010warmest | 98° | 65° | 81° | — | — |
| 2009 | 66° | 59° | 63° | — | — |
| 2008 | 74° | 56° | 65° | — | — |
| 2007 | 65° | 53° | 59° | — | — |
| 2006 | 65° | 55° | 60° | — | — |
| 2005 | 86° | 53° | 70° | — | — |
| 2004 | 70° | 59° | 64° | — | — |
| 2003 | 67° | 59° | 63° | — | — |
| 2002 | 70° | 57° | 63° | — | — |
| 2001 | 71° | 56° | 63° | — | — |
| 2000 | 63° | 57° | 60° | — | — |
| 1999 | 87° | 58° | 72° | — | — |
| 1998 | 72° | 59° | 65° | — | — |
| 1997 | 88° | 67° | 77° | — | — |
| 1996 | 74° | 50° | 62° | — | — |
| 1995 | 68° | 55° | 62° | — | — |
| 1994 | 71° | 56° | 63° | — | — |
| 1993 | 84° | 66° | 75° | — | — |
| 1992 | 87° | 65° | 76° | — | — |
| 1989 | 74° | 56° | 65° | — | — |
| 1988 | 83° | 52° | 67° | — | — |
| 1987 | 87° | 53° | 70° | — | — |
| 1986 | 69° | 52° | 60° | — | — |
| 1985 | 65° | 54° | 59° | — | — |
| 1984 | 92° | 60° | 76° | — | — |
| 1983 | 70° | 55° | 62° | — | — |
| 1982 | 72° | 52° | 62° | — | — |
| 1981 | 75° | 57° | 66° | 0.03" | — |
| 1980 | 66° | 55° | 61° | — | — |
| 1979 | 74° | 53° | 63° | — | — |
| 1978 | 75° | 52° | 63° | — | — |
| 1977 | 76° | 59° | 67° | 0.13" | — |
| 1976 | 70° | 59° | 64° | 0.51" | — |
| 1975 | 76° | 50° | 63° | — | — |
| 1974 | 70° | 51° | 60° | — | — |
| 1973 | 93° | 56° | 74° | — | — |
| 1972 | 69° | 52° | 60° | 0.25" | — |
| 1971coldest | 68° | 46° | 57° | — | — |
53 years of data from HAYWARD AIR TERMINAL