Weather on August 15
Hayward, CA
55 Years of Data
Avg High
75°F
Avg Low
57°F
Warmest
2020
83°F avg
Coldest
1987
56°F avg
About This Date
August 15th in Hayward, CA typically brings pleasant summer weather, with average highs around 75°F and lows near 57°F. Over 52 years of records, the warmest August 15th was in 2020 (83°F average), while the coldest was 1987 (56°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 15th dates historically, with the wettest August 15th recording 1.37" of rain. The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Hayward, CA? Great weather for outdoor activities.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 58° | 65° | — | — |
| 2024 | 74° | 60° | 67° | — | — |
| 2023 | 86° | 63° | 74° | — | — |
| 2022 | 85° | 58° | 71° | — | — |
| 2021 | 77° | 60° | 69° | — | — |
| 2020warmest | 97° | 69° | 83° | — | — |
| 2019 | 98° | 64° | 81° | — | — |
| 2018 | 72° | 62° | 67° | — | — |
| 2017 | 69° | 59° | 64° | — | — |
| 2016 | 73° | 57° | 65° | — | — |
| 2015 | 92° | 59° | 75° | — | — |
| 2014 | 80° | 61° | 70° | — | — |
| 2013 | 76° | 61° | 68° | — | — |
| 2012 | 71° | 58° | 64° | — | — |
| 2011 | 75° | 55° | 65° | — | — |
| 2010 | 66° | 56° | 61° | — | — |
| 2009 | 80° | 55° | 68° | — | — |
| 2008 | 82° | 57° | 70° | — | — |
| 2007 | 71° | 57° | 64° | — | — |
| 2006 | 71° | 58° | 64° | — | — |
| 2005 | 71° | 58° | 64° | — | — |
| 2004 | 71° | 60° | 66° | — | — |
| 2003 | 75° | 61° | 68° | — | — |
| 2002 | 74° | 59° | 66° | — | — |
| 2001 | 70° | 56° | 63° | — | — |
| 2000 | 80° | 55° | 68° | — | — |
| 1999 | 76° | 55° | 65° | — | — |
| 1998 | 70° | 54° | 62° | — | — |
| 1997 | 66° | 54° | 60° | — | — |
| 1996 | 90° | 61° | 75° | — | — |
| 1995 | 74° | 55° | 64° | — | — |
| 1994 | 87° | 58° | 72° | — | — |
| 1993 | 64° | 54° | 59° | — | — |
| 1989 | 91° | 54° | 72° | — | — |
| 1988 | 63° | 56° | 59° | — | — |
| 1987coldest | 60° | 52° | 56° | — | — |
| 1986 | 72° | 57° | 64° | — | — |
| 1985 | 69° | 54° | 61° | — | — |
| 1984 | 80° | 54° | 67° | — | — |
| 1983 | 80° | 60° | 70° | — | — |
| 1982 | 68° | 55° | 62° | — | — |
| 1981 | 71° | 55° | 63° | — | — |
| 1980 | 63° | 52° | 57° | — | — |
| 1979 | 72° | 55° | 63° | — | — |
| 1978 | 77° | 50° | 64° | — | — |
| 1977 | 75° | 53° | 64° | — | — |
| 1976 | 66° | 55° | 61° | 1.37" | — |
| 1975 | 67° | 49° | 58° | — | — |
| 1974 | 76° | 52° | 64° | — | — |
| 1973 | 82° | 48° | 65° | — | — |
| 1972 | 68° | 50° | 59° | — | — |
| 1971 | 69° | 57° | 63° | — | — |
52 years of data from HAYWARD AIR TERMINAL