Weather on April 21
Hayward, CA
55 Years of Data
Avg High
68°F
Avg Low
48°F
Warmest
2009
77°F avg
Coldest
1995
35°F avg
About This Date
April 21st in Hayward, CA typically brings mild spring weather, with average highs around 68°F and lows near 48°F. Over 51 years of records, the warmest April 21st was in 2009 (77°F average), while the coldest was 1995 (35°F) — a 42°F range across recorded history. Rain or other precipitation has occurred on about 20% of April 21st dates historically, with the wettest April 21st recording 0.53" of rain. The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Hayward, CA? Great weather for outdoor activities.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 49° | 62° | — | — |
| 2024 | 77° | 54° | 65° | — | — |
| 2023 | 74° | 49° | 61° | — | — |
| 2022 | 64° | 52° | 58° | 0.48" | — |
| 2021 | 62° | 50° | 56° | — | — |
| 2020 | 65° | 54° | 59° | — | — |
| 2019 | 68° | 49° | 58° | — | — |
| 2018 | 76° | 49° | 62° | — | — |
| 2017 | 75° | 50° | 63° | — | — |
| 2016 | 72° | 61° | 66° | — | — |
| 2015 | 62° | 54° | 58° | — | — |
| 2014 | 67° | 47° | 57° | — | — |
| 2013 | 82° | 50° | 66° | — | — |
| 2012 | 83° | 58° | 70° | — | — |
| 2011 | 62° | 51° | 57° | 0.08" | — |
| 2010 | 60° | 49° | 54° | 0.1" | — |
| 2009warmest | 92° | 62° | 77° | — | — |
| 2008 | 56° | 39° | 47° | — | — |
| 2007 | 59° | 50° | 55° | 0.53" | — |
| 2006 | 63° | 53° | 58° | — | — |
| 2005 | 73° | 51° | 62° | — | — |
| 2004 | 60° | 50° | 55° | — | — |
| 2003 | 56° | 49° | 52° | 0.43" | — |
| 2002 | 69° | 50° | 60° | — | — |
| 2001 | 61° | 40° | 50° | — | — |
| 2000 | 62° | 51° | 57° | — | — |
| 1999 | 62° | 50° | 56° | — | — |
| 1998 | 84° | 54° | 69° | — | — |
| 1997 | 65° | 55° | 60° | — | — |
| 1996 | 61° | 46° | 53° | — | — |
| 1995coldest | 69° | 0° | 35° | — | — |
| 1994 | 63° | 49° | 56° | — | — |
| 1993 | 63° | 49° | 56° | — | — |
| 1989 | 69° | 53° | 61° | 0.28" | — |
| 1987 | 83° | 50° | 66° | — | — |
| 1986 | 85° | 53° | 69° | — | — |
| 1985 | 54° | 47° | 50° | 0.1" | — |
| 1984 | 65° | 42° | 53° | — | — |
| 1983 | 65° | 52° | 58° | 0.3" | — |
| 1982 | 78° | 60° | 69° | — | — |
| 1981 | 66° | 47° | 56° | — | — |
| 1980 | 67° | 44° | 55° | 0.53" | — |
| 1979 | 66° | 42° | 54° | — | — |
| 1978 | 60° | 40° | 50° | — | — |
| 1977 | 67° | 42° | 54° | — | — |
| 1976 | 76° | 40° | 58° | — | — |
| 1975 | 70° | 42° | 56° | — | — |
| 1974 | 68° | 40° | 54° | — | — |
| 1973 | 68° | 48° | 58° | — | — |
| 1972 | 62° | 41° | 52° | — | — |
| 1971 | 57° | 37° | 47° | 0.1" | — |
51 years of data from HAYWARD AIR TERMINAL