Weather on July 21
Hayward, CA
55 Years of Data
Avg High
74°F
Avg Low
56°F
Warmest
2006
78°F avg
Coldest
1973
59°F avg
About This Date
July 21st in Hayward, CA typically brings pleasant summer weather, with average highs around 74°F and lows near 56°F. Over 52 years of records, the warmest July 21st was in 2006 (78°F average), while the coldest was 1973 (59°F) — a 19°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for July 21st 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 | 68° | 59° | 64° | — | — |
| 2024 | 67° | 59° | 63° | — | — |
| 2023 | 81° | 59° | 70° | — | — |
| 2022 | 71° | 55° | 63° | — | — |
| 2021 | 71° | 56° | 63° | — | — |
| 2020 | 72° | 58° | 65° | — | — |
| 2019 | 78° | 59° | 69° | — | — |
| 2018 | 80° | 62° | 71° | — | — |
| 2017 | 73° | 58° | 65° | — | — |
| 2016 | 71° | 58° | 64° | — | — |
| 2015 | 71° | 61° | 66° | — | — |
| 2014 | 76° | 61° | 68° | — | — |
| 2013 | 72° | 56° | 64° | — | — |
| 2012 | 90° | 57° | 73° | — | — |
| 2011 | 80° | 56° | 68° | — | — |
| 2010 | 64° | 56° | 60° | — | — |
| 2009 | 65° | 56° | 60° | — | — |
| 2008 | 68° | 55° | 62° | — | — |
| 2007 | 76° | 62° | 69° | — | — |
| 2006warmest | 90° | 66° | 78° | — | — |
| 2005 | 71° | 59° | 65° | — | — |
| 2004 | 82° | 60° | 71° | — | — |
| 2003 | 82° | 60° | 71° | — | — |
| 2002 | 73° | 59° | 66° | — | — |
| 2001 | 66° | 57° | 62° | — | — |
| 2000 | 64° | 55° | 60° | — | — |
| 1999 | 69° | 58° | 63° | — | — |
| 1998 | 68° | 52° | 60° | — | — |
| 1997 | 80° | 53° | 67° | — | — |
| 1996 | 90° | 65° | 77° | — | — |
| 1995 | 71° | 58° | 64° | — | — |
| 1994 | 65° | 53° | 59° | — | — |
| 1993 | 70° | 52° | 61° | — | — |
| 1989 | 78° | 51° | 65° | — | — |
| 1988 | 73° | 56° | 64° | — | — |
| 1987 | 70° | 52° | 61° | — | — |
| 1986 | 88° | 53° | 70° | — | — |
| 1985 | 66° | 55° | 61° | — | — |
| 1984 | 73° | 65° | 69° | — | — |
| 1983 | 79° | 55° | 67° | — | — |
| 1982 | 71° | 53° | 62° | — | — |
| 1981 | 86° | 51° | 69° | — | — |
| 1980 | 74° | 54° | 64° | — | — |
| 1979 | 70° | 54° | 62° | — | — |
| 1978 | 72° | 51° | 61° | — | — |
| 1977 | 78° | 54° | 66° | — | — |
| 1976 | 73° | 45° | 59° | — | — |
| 1975 | 67° | 53° | 60° | — | — |
| 1974 | 81° | 52° | 66° | — | — |
| 1973coldest | 67° | 51° | 59° | — | — |
| 1972 | 64° | 55° | 60° | — | — |
| 1971 | 76° | 53° | 64° | — | — |
52 years of data from HAYWARD AIR TERMINAL