Weather on May 21
Phoenix, AZ
55 Years of Data
Avg High
96°F
Avg Low
63°F
Warmest
2000
89°F avg
Coldest
1975
66°F avg
About This Date
May 21st in Phoenix, AZ typically brings hot spring weather, with average highs around 96°F and lows near 63°F — a 33°F daily swing. Over 55 years of records, the warmest May 21st was in 2000 (89°F average), while the coldest was 1975 (66°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 21st dates historically, with the wettest May 21st recording 1.12" of rain. The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Phoenix, AZ? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 102° | 67° | 84° | — | — |
| 2024 | 94° | 61° | 77° | — | — |
| 2023 | 100° | 70° | 85° | — | — |
| 2022 | 92° | 66° | 79° | — | — |
| 2021 | 86° | 64° | 75° | — | — |
| 2020 | 92° | 58° | 75° | — | — |
| 2019 | 82° | 53° | 68° | — | — |
| 2018 | 91° | 67° | 79° | — | — |
| 2017 | 100° | 57° | 79° | — | — |
| 2016 | 96° | 68° | 82° | — | — |
| 2015 | 89° | 68° | 79° | — | — |
| 2014 | 93° | 64° | 79° | — | — |
| 2013 | 98° | 67° | 82° | — | — |
| 2012 | 107° | 69° | 88° | — | — |
| 2011 | 93° | 53° | 73° | — | — |
| 2010 | 98° | 68° | 83° | — | — |
| 2009 | 97° | 77° | 87° | — | — |
| 2008 | 104° | 72° | 88° | — | — |
| 2007 | 98° | 68° | 83° | — | — |
| 2006 | 104° | 73° | 89° | — | — |
| 2005 | 107° | 72° | 89° | — | — |
| 2004 | 94° | 67° | 80° | — | — |
| 2003 | 105° | 70° | 87° | — | — |
| 2002 | 93° | 57° | 75° | — | — |
| 2001 | 102° | 72° | 87° | — | — |
| 2000warmest | 107° | 71° | 89° | — | — |
| 1999 | 100° | 64° | 82° | — | — |
| 1998 | 88° | 58° | 73° | — | — |
| 1997 | 94° | 64° | 79° | — | — |
| 1996 | 98° | 65° | 81° | — | — |
| 1995 | 97° | 64° | 80° | — | — |
| 1994 | 96° | 56° | 76° | — | — |
| 1993 | 97° | 72° | 84° | — | — |
| 1992 | 79° | 59° | 69° | 1.12" | — |
| 1991 | 91° | 58° | 74° | — | — |
| 1990 | 96° | 62° | 79° | — | — |
| 1989 | 102° | 65° | 83° | — | — |
| 1988 | 97° | 59° | 78° | — | — |
| 1987 | 87° | 61° | 74° | — | — |
| 1986 | 100° | 70° | 85° | — | — |
| 1985 | 92° | 65° | 78° | — | — |
| 1984 | 101° | 68° | 84° | — | — |
| 1983 | 98° | 57° | 78° | — | — |
| 1982 | 100° | 58° | 79° | — | — |
| 1981 | 88° | 50° | 69° | — | — |
| 1980 | 103° | 63° | 83° | — | — |
| 1979 | 88° | 59° | 73° | — | — |
| 1978 | 100° | 58° | 79° | — | — |
| 1977 | 94° | 58° | 76° | — | — |
| 1976 | 97° | 67° | 82° | — | — |
| 1975coldest | 80° | 51° | 66° | — | — |
| 1974 | 94° | 51° | 72° | — | — |
| 1973 | 97° | 62° | 79° | — | — |
| 1972 | 89° | 54° | 71° | — | — |
| 1971 | 91° | 56° | 73° | — | — |
55 years of data from BEARDSLEY