Weather on September 19
Hayward, CA
55 Years of Data
Avg High
76°F
Avg Low
56°F
Warmest
2000
81°F avg
Coldest
1989
58°F avg
About This Date
September 19th 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 19th was in 2000 (81°F average), while the coldest was 1989 (58°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 9% of September 19th dates historically, with the wettest September 19th recording 0.66" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for September 19th in Hayward, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 61° | 68° | — | — |
| 2024 | 72° | 59° | 65° | — | — |
| 2023 | 72° | 61° | 66° | — | — |
| 2022 | 77° | 57° | 67° | — | — |
| 2021 | 73° | 59° | 66° | — | — |
| 2020 | 79° | 64° | 71° | — | — |
| 2019 | 75° | 55° | 65° | — | — |
| 2018 | 76° | 54° | 65° | — | — |
| 2017 | 73° | 54° | 63° | — | — |
| 2016 | 94° | 63° | 78° | — | — |
| 2015 | 88° | 54° | 71° | — | — |
| 2014 | 78° | 64° | 71° | — | — |
| 2013 | 85° | 50° | 67° | — | — |
| 2012 | 66° | 55° | 61° | — | — |
| 2011 | 93° | 59° | 76° | — | — |
| 2010 | 74° | 62° | 68° | — | — |
| 2009 | 76° | 60° | 68° | — | — |
| 2008 | 74° | 51° | 62° | — | — |
| 2007 | 64° | 56° | 60° | — | — |
| 2006 | 69° | 57° | 63° | — | — |
| 2005 | 85° | 53° | 69° | — | — |
| 2004 | 66° | 56° | 61° | 0.36" | — |
| 2003 | 86° | 59° | 73° | — | — |
| 2002 | 91° | 63° | 77° | — | — |
| 2001 | 70° | 56° | 63° | — | — |
| 2000warmest | 96° | 66° | 81° | — | — |
| 1999 | 68° | 59° | 64° | — | — |
| 1998 | 78° | 56° | 67° | — | — |
| 1997 | 80° | 53° | 67° | — | — |
| 1996 | 82° | 60° | 71° | — | — |
| 1995 | 90° | 71° | 80° | — | — |
| 1994 | 72° | 52° | 62° | — | — |
| 1993 | 77° | 50° | 64° | — | — |
| 1992 | 75° | 52° | 63° | — | — |
| 1989coldest | 67° | 50° | 58° | 0.2" | — |
| 1988 | 84° | 54° | 69° | — | — |
| 1987 | 79° | 49° | 64° | — | — |
| 1986 | 70° | 53° | 61° | — | — |
| 1985 | 71° | 51° | 61° | — | — |
| 1984 | 90° | 66° | 78° | 0.1" | — |
| 1983 | 75° | 55° | 65° | — | — |
| 1982 | 70° | 56° | 63° | 0.15" | — |
| 1981 | 71° | 59° | 65° | — | — |
| 1980 | 71° | 56° | 63° | — | — |
| 1979 | 75° | 57° | 66° | — | — |
| 1978 | 73° | 47° | 60° | — | — |
| 1977 | 77° | 58° | 67° | 0.66" | — |
| 1976 | 64° | 53° | 59° | — | — |
| 1975 | 67° | 52° | 59° | — | — |
| 1974 | 73° | 53° | 63° | — | — |
| 1973 | 69° | 53° | 61° | — | — |
| 1972 | 70° | 50° | 60° | — | — |
| 1971 | 77° | 50° | 64° | — | — |
53 years of data from HAYWARD AIR TERMINAL