Weather on September 27
Hayward, CA
55 Years of Data
Avg High
76°F
Avg Low
56°F
Warmest
1993
80°F avg
Coldest
1971
56°F avg
About This Date
September 27th 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 27th was in 1993 (80°F average), while the coldest was 1971 (56°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 8% of September 27th dates historically, with the wettest September 27th recording 2.06" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for September 27th in Hayward, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 57° | 65° | — | — |
| 2024 | 91° | 57° | 74° | — | — |
| 2023 | 76° | 56° | 66° | — | — |
| 2022 | 70° | 58° | 64° | — | — |
| 2021 | 71° | 59° | 65° | — | — |
| 2020 | 98° | 61° | 79° | — | — |
| 2019 | 69° | 58° | 63° | — | — |
| 2018 | 70° | 54° | 62° | — | — |
| 2017 | 88° | 61° | 74° | — | — |
| 2016 | 90° | 60° | 75° | — | — |
| 2015 | 74° | 57° | 65° | — | — |
| 2014 | 72° | 61° | 66° | — | — |
| 2013 | 75° | 48° | 62° | — | — |
| 2012 | 75° | 53° | 64° | — | — |
| 2011 | 83° | 57° | 70° | — | — |
| 2010 | 91° | 60° | 76° | — | — |
| 2009 | 88° | 60° | 74° | — | — |
| 2008 | 84° | 56° | 70° | — | — |
| 2007 | 73° | 57° | 65° | — | — |
| 2006 | 69° | 58° | 63° | — | — |
| 2005 | 73° | 58° | 65° | — | — |
| 2004 | 66° | 54° | 60° | — | — |
| 2003 | 67° | 59° | 63° | — | — |
| 2002 | 67° | 60° | 63° | — | — |
| 2001 | 67° | 58° | 62° | — | — |
| 2000 | 69° | 59° | 64° | — | — |
| 1999 | 93° | 59° | 76° | — | — |
| 1998 | 63° | 55° | 59° | — | — |
| 1997 | 81° | 56° | 68° | — | — |
| 1996 | 70° | 51° | 60° | — | — |
| 1995 | 68° | 56° | 62° | — | — |
| 1994 | 69° | 54° | 61° | — | — |
| 1993warmest | 93° | 66° | 80° | — | — |
| 1992 | 90° | 66° | 78° | — | — |
| 1989 | 74° | 54° | 64° | — | — |
| 1988 | 75° | 57° | 66° | — | — |
| 1987 | 80° | 50° | 65° | — | — |
| 1986 | 67° | 50° | 58° | 1.12" | — |
| 1985 | 71° | 60° | 66° | — | — |
| 1984 | 91° | 60° | 76° | — | — |
| 1983 | 65° | 60° | 62° | — | — |
| 1982 | 70° | 50° | 60° | — | — |
| 1981 | 76° | 57° | 66° | 0.03" | — |
| 1980 | 70° | 56° | 63° | — | — |
| 1979 | 78° | 53° | 66° | — | — |
| 1978 | 73° | 54° | 63° | — | — |
| 1977 | 75° | 58° | 66° | — | — |
| 1976 | 68° | 56° | 62° | — | — |
| 1975 | 80° | 49° | 64° | — | — |
| 1974 | 63° | 54° | 58° | — | — |
| 1973 | 87° | 51° | 69° | — | — |
| 1972 | 67° | 58° | 62° | 2.06" | — |
| 1971coldest | 66° | 47° | 56° | 0.08" | — |
53 years of data from HAYWARD AIR TERMINAL