Weather on May 21
Tucson, AZ
55 Years of Data
Avg High
92°F
Avg Low
63°F
Warmest
2003
90°F avg
Coldest
1975
65°F avg
About This Date
May 21st in Tucson, AZ typically brings hot spring weather, with average highs around 92°F and lows near 63°F — a 29°F daily swing. Over 55 years of records, the warmest May 21st was in 2003 (90°F average), while the coldest was 1975 (65°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 21st dates historically, with the wettest May 21st recording 1.02" 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 Tucson, AZ? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 63° | 81° | — | — |
| 2024 | 94° | 64° | 79° | — | — |
| 2023 | 95° | 66° | 81° | — | — |
| 2022 | 94° | 68° | 81° | — | — |
| 2021 | 89° | 68° | 79° | — | — |
| 2020 | 89° | 53° | 71° | — | — |
| 2019 | 81° | 50° | 65° | — | — |
| 2018 | 95° | 63° | 79° | — | — |
| 2017 | 97° | 59° | 78° | — | — |
| 2016 | 89° | 65° | 77° | — | — |
| 2015 | 87° | 60° | 74° | — | — |
| 2014 | 92° | 62° | 77° | — | — |
| 2013 | 95° | 62° | 79° | — | — |
| 2012 | 105° | 60° | 83° | — | — |
| 2011 | 90° | 52° | 71° | — | — |
| 2010 | 96° | 61° | 78° | — | — |
| 2009 | 83° | 63° | 73° | 1.02" | — |
| 2008 | 102° | 62° | 82° | — | — |
| 2007 | 91° | 69° | 80° | — | — |
| 2006 | 98° | 73° | 86° | — | — |
| 2005 | 106° | 73° | 89° | — | — |
| 2004 | 90° | 67° | 78° | — | — |
| 2003warmest | 102° | 78° | 90° | — | — |
| 2002 | 77° | 62° | 70° | — | — |
| 2001 | 95° | 67° | 81° | — | — |
| 2000 | 100° | 67° | 83° | — | — |
| 1999 | 96° | 61° | 78° | — | — |
| 1998 | 87° | 66° | 77° | — | — |
| 1997 | 93° | 65° | 79° | — | — |
| 1996 | 100° | 70° | 85° | — | — |
| 1995 | 98° | 70° | 84° | — | — |
| 1994 | 96° | 60° | 78° | — | — |
| 1993 | 94° | 71° | 82° | — | — |
| 1992 | 75° | 60° | 68° | 0.15" | — |
| 1991 | 90° | 64° | 77° | — | — |
| 1990 | 97° | 62° | 79° | — | — |
| 1989 | 100° | 66° | 83° | — | — |
| 1988 | 97° | 61° | 79° | — | — |
| 1987 | 83° | 61° | 72° | — | — |
| 1986 | 94° | 72° | 83° | — | — |
| 1985 | 89° | 64° | 77° | — | — |
| 1984 | 97° | 66° | 81° | — | — |
| 1983 | 91° | 60° | 76° | — | — |
| 1982 | 98° | 64° | 81° | — | — |
| 1981 | 82° | 56° | 69° | — | — |
| 1980 | 96° | 66° | 81° | — | — |
| 1979 | 82° | 56° | 69° | — | — |
| 1978 | 98° | 66° | 82° | — | — |
| 1977 | 89° | 56° | 72° | — | — |
| 1976 | 92° | 63° | 77° | — | — |
| 1975coldest | 75° | 56° | 65° | — | — |
| 1974 | 92° | 49° | 70° | — | — |
| 1973 | 94° | 64° | 79° | — | — |
| 1972 | 85° | 56° | 70° | — | — |
| 1971 | 91° | 64° | 78° | — | — |
55 years of data from TUCSON WFO