Weather on May 20
Hayward, CA
55 Years of Data
Avg High
69°F
Avg Low
51°F
Warmest
1983
72°F avg
Coldest
1974
51°F avg
About This Date
May 20th in Hayward, CA typically brings mild spring weather, with average highs around 69°F and lows near 51°F. Over 52 years of records, the warmest May 20th was in 1983 (72°F average), while the coldest was 1974 (51°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 20th dates historically, with the wettest May 20th recording 1.17" of rain. 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 May 20th in Hayward, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 55° | 63° | — | — |
| 2024 | 75° | 52° | 63° | — | — |
| 2023 | 64° | 53° | 59° | — | — |
| 2022 | 73° | 50° | 62° | — | — |
| 2021 | 65° | 47° | 56° | — | — |
| 2020 | 69° | 56° | 62° | — | — |
| 2019 | 63° | 49° | 56° | 0.03" | — |
| 2018 | 62° | 54° | 58° | — | — |
| 2017 | 89° | 56° | 72° | — | — |
| 2016 | 63° | 53° | 58° | — | — |
| 2015 | 62° | 55° | 59° | — | — |
| 2014 | 67° | 53° | 60° | — | — |
| 2013 | 84° | 53° | 69° | — | — |
| 2012 | 75° | 53° | 64° | — | — |
| 2011 | 65° | 54° | 59° | — | — |
| 2010 | 68° | 50° | 59° | — | — |
| 2009 | 66° | 51° | 59° | — | — |
| 2008 | 65° | 52° | 58° | — | — |
| 2007 | 66° | 51° | 59° | — | — |
| 2006 | 70° | 54° | 62° | — | — |
| 2005 | 68° | 53° | 61° | — | — |
| 2004 | 63° | 54° | 58° | — | — |
| 2003 | 80° | 56° | 68° | — | — |
| 2002 | 62° | 51° | 57° | 1.17" | — |
| 2001 | 86° | 53° | 70° | — | — |
| 2000 | 84° | 57° | 71° | — | — |
| 1999 | 58° | 51° | 54° | — | — |
| 1998 | 60° | 44° | 52° | — | — |
| 1997 | 64° | 52° | 58° | — | — |
| 1996 | 65° | 49° | 57° | — | — |
| 1995 | 63° | 54° | 58° | — | — |
| 1994 | 64° | 50° | 57° | — | — |
| 1993 | 67° | 55° | 61° | — | — |
| 1989 | 76° | 46° | 61° | — | — |
| 1988 | 75° | 50° | 63° | — | — |
| 1987 | 66° | 52° | 59° | — | — |
| 1986 | 63° | 50° | 56° | — | — |
| 1985 | 67° | 51° | 59° | — | — |
| 1984 | 72° | 50° | 61° | — | — |
| 1983warmest | 88° | 56° | 72° | — | — |
| 1982 | 78° | 46° | 62° | — | — |
| 1981 | 63° | 49° | 56° | — | — |
| 1980 | 82° | 49° | 65° | — | — |
| 1979 | 68° | 55° | 62° | — | — |
| 1978 | 90° | 52° | 71° | — | — |
| 1977 | 70° | 51° | 60° | — | — |
| 1976 | 66° | 41° | 54° | — | — |
| 1975 | 65° | 43° | 54° | — | — |
| 1974coldest | 64° | 37° | 51° | — | — |
| 1973 | 60° | 53° | 57° | — | — |
| 1972 | 62° | 49° | 55° | — | — |
| 1971 | 69° | 46° | 58° | — | — |
52 years of data from HAYWARD AIR TERMINAL