Weather on March 21
Phoenix, AZ
55 Years of Data
Avg High
80°F
Avg Low
51°F
Warmest
2026
86°F avg
Coldest
1991
52°F avg
About This Date
March 21st in Phoenix, AZ typically brings warm spring weather, with average highs around 80°F and lows near 51°F — a 29°F daily swing. Over 55 years of records, the warmest March 21st was in 2026 (86°F average), while the coldest was 1991 (52°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 15% of March 21st dates historically, with the wettest March 21st recording 2.03" 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 March 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 |
|---|---|---|---|---|---|
| 2026warmest | 105° | 66° | 86° | — | — |
| 2025 | 81° | 49° | 65° | — | — |
| 2024 | 85° | 52° | 68° | — | — |
| 2023 | 62° | 56° | 59° | 1.09" | — |
| 2022 | 78° | 48° | 63° | — | — |
| 2021 | 77° | 48° | 63° | — | — |
| 2020 | 71° | 46° | 59° | — | — |
| 2019 | 79° | 51° | 65° | — | — |
| 2018 | 80° | 42° | 61° | — | — |
| 2017 | 94° | 62° | 78° | — | — |
| 2016 | 91° | 57° | 74° | — | — |
| 2015 | 84° | 58° | 71° | — | — |
| 2014 | 82° | 49° | 65° | — | — |
| 2013 | 84° | 59° | 72° | — | — |
| 2012 | 75° | 44° | 60° | — | — |
| 2011 | 75° | 51° | 63° | 0.28" | — |
| 2010 | 77° | 47° | 62° | — | — |
| 2009 | 88° | 57° | 72° | — | — |
| 2008 | 85° | 51° | 68° | — | — |
| 2007 | 79° | 61° | 70° | — | — |
| 2006 | 64° | 45° | 54° | 0.18" | — |
| 2005 | 74° | 45° | 59° | — | — |
| 2004 | 97° | 62° | 79° | — | — |
| 2003 | 76° | 49° | 62° | — | — |
| 2002 | 91° | 51° | 71° | — | — |
| 2001 | 89° | 56° | 72° | — | — |
| 2000 | 64° | 47° | 55° | — | — |
| 1999 | 87° | 50° | 69° | — | — |
| 1997 | 95° | 58° | 76° | — | — |
| 1996 | 89° | 56° | 72° | — | — |
| 1995 | 85° | 56° | 70° | — | — |
| 1994 | 79° | 51° | 65° | — | — |
| 1993 | 82° | 52° | 67° | — | — |
| 1992 | 78° | 57° | 68° | 0.08" | — |
| 1991coldest | 62° | 43° | 52° | 1.5" | — |
| 1990 | 89° | 56° | 72° | — | — |
| 1989 | 81° | 55° | 68° | — | — |
| 1988 | 87° | 46° | 67° | — | — |
| 1987 | 69° | 39° | 54° | — | — |
| 1986 | 84° | 49° | 66° | — | — |
| 1985 | 78° | 46° | 62° | — | — |
| 1984 | 86° | 49° | 67° | — | — |
| 1983 | 65° | 45° | 55° | 0.81" | — |
| 1982 | 70° | 37° | 53° | — | — |
| 1981 | 75° | 43° | 59° | — | — |
| 1980 | 78° | 44° | 61° | — | — |
| 1979 | 61° | 46° | 53° | 2.03" | — |
| 1978 | 82° | 60° | 71° | — | — |
| 1977 | 80° | 42° | 61° | — | — |
| 1976 | 85° | 45° | 65° | — | — |
| 1975 | 79° | 57° | 68° | — | — |
| 1974 | 73° | 54° | 63° | — | — |
| 1973 | 69° | 47° | 58° | 0.03" | — |
| 1972 | 94° | 52° | 73° | — | — |
| 1971 | 85° | 38° | 61° | — | — |
55 years of data from BEARDSLEY