Weather on March 21
Tempe, AZ
55 Years of Data
Avg High
81°F
Avg Low
50°F
Warmest
2026
87°F avg
Coldest
1979
50°F avg
About This Date
March 21st in Tempe, AZ typically brings warm spring weather, with average highs around 81°F and lows near 50°F — a 31°F daily swing. Over 56 years of records, the warmest March 21st was in 2026 (87°F average), while the coldest was 1979 (50°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 13% of March 21st dates historically, with the wettest March 21st recording 1.5" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Tempe, AZ? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 105° | 70° | 87° | — | — |
| 2025 | 85° | 47° | 66° | — | — |
| 2024 | 83° | 56° | 69° | — | — |
| 2023 | — | 59° | — | — | — |
| 2022 | — | 44° | — | — | — |
| 2021 | — | 52° | — | — | — |
| 2020 | 79° | 47° | 63° | — | — |
| 2019 | 82° | 49° | 65° | — | — |
| 2018 | 84° | 47° | 65° | — | — |
| 2017 | 93° | 53° | 73° | — | — |
| 2016 | 93° | 50° | 72° | — | — |
| 2015 | 84° | 53° | 69° | — | — |
| 2014 | — | 40° | — | — | — |
| 2013 | 86° | 58° | 72° | — | — |
| 2012 | 76° | 37° | 56° | — | — |
| 2011 | — | 49° | — | 0.23" | — |
| 2010 | 81° | 43° | 62° | — | — |
| 2009 | 89° | 50° | 70° | — | — |
| 2008 | 87° | 45° | 66° | — | — |
| 2007 | 85° | 55° | 70° | — | — |
| 2006 | 66° | 41° | 54° | — | — |
| 2005 | 74° | 47° | 60° | — | — |
| 2004 | 96° | 62° | 79° | — | — |
| 2003 | 75° | 52° | 63° | — | — |
| 2002 | 92° | 52° | 72° | — | — |
| 2001 | 90° | 57° | 73° | — | — |
| 2000 | 63° | 46° | 54° | — | — |
| 1999 | 81° | 52° | 66° | — | — |
| 1998 | 81° | 50° | 65° | — | — |
| 1997 | 94° | 61° | 77° | — | — |
| 1996 | 88° | 58° | 73° | — | — |
| 1995 | 84° | 58° | 71° | — | — |
| 1994 | 79° | 45° | 62° | — | — |
| 1993 | 84° | 51° | 68° | — | — |
| 1992 | 80° | 57° | 69° | 0.51" | — |
| 1991 | 64° | 42° | 53° | 1.5" | — |
| 1990 | 60° | 89° | 75° | — | — |
| 1989 | 82° | 49° | 65° | — | — |
| 1988 | 89° | 48° | 69° | — | — |
| 1987 | 72° | 42° | 57° | — | — |
| 1986 | 86° | 50° | 68° | — | — |
| 1985 | 81° | 50° | 65° | — | — |
| 1984 | 87° | 50° | 69° | — | — |
| 1983 | 66° | 47° | 56° | 0.53" | — |
| 1982 | 71° | 42° | 57° | — | — |
| 1981 | 79° | 40° | 59° | — | — |
| 1980 | 74° | 40° | 57° | — | — |
| 1979coldest | 63° | 38° | 50° | 0.91" | — |
| 1978 | 81° | 55° | 68° | — | — |
| 1977 | 80° | 35° | 58° | — | — |
| 1976 | 79° | 36° | 57° | — | — |
| 1975 | 83° | 52° | 67° | — | — |
| 1974 | 69° | 54° | 61° | 0.38" | — |
| 1973 | 76° | 46° | 61° | 0.25" | — |
| 1972 | 90° | 47° | 68° | — | — |
| 1971 | 86° | 34° | 60° | — | — |
56 years of data from TEMPE ASU