Weather on September 21
Tucson, AZ
55 Years of Data
Avg High
95°F
Avg Low
69°F
Warmest
2010
88°F avg
Coldest
2004
72°F avg
About This Date
September 21st in Tucson, AZ typically brings hot fall weather, with average highs around 95°F and lows near 69°F — a 26°F daily swing. Over 55 years of records, the warmest September 21st was in 2010 (88°F average), while the coldest was 2004 (72°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 21st dates historically, with the wettest September 21st recording 2.64" 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 September 21st in Tucson, AZ? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 73° | 83° | 0.13" | — |
| 2024 | 86° | 66° | 76° | — | — |
| 2023 | 97° | 67° | 82° | — | — |
| 2022 | 91° | 74° | 82° | — | — |
| 2021 | 98° | 65° | 81° | — | — |
| 2020 | 99° | 73° | 86° | — | — |
| 2019 | 92° | 71° | 81° | — | — |
| 2018 | 94° | 68° | 81° | — | — |
| 2017 | 96° | 72° | 84° | — | — |
| 2016 | 97° | 73° | 85° | — | — |
| 2015 | 81° | 69° | 75° | 2.64" | — |
| 2014 | 95° | 72° | 83° | — | — |
| 2013 | 97° | 74° | 85° | — | — |
| 2012 | 102° | 69° | 86° | — | — |
| 2011 | 99° | 64° | 81° | — | — |
| 2010warmest | 100° | 76° | 88° | 0.08" | — |
| 2009 | 98° | 64° | 81° | — | — |
| 2008 | 98° | 69° | 84° | — | — |
| 2007 | 94° | 71° | 82° | — | — |
| 2006 | 87° | 67° | 77° | — | — |
| 2005 | 98° | 75° | 87° | — | — |
| 2004coldest | 80° | 64° | 72° | — | — |
| 2003 | 100° | 67° | 83° | — | — |
| 2002 | 95° | 66° | 81° | — | — |
| 2001 | 100° | 70° | 85° | — | — |
| 2000 | 95° | 77° | 86° | — | — |
| 1999 | 92° | 74° | 83° | — | — |
| 1998 | 92° | 74° | 83° | — | — |
| 1997 | 98° | 70° | 84° | 0.3" | — |
| 1996 | 94° | 65° | 79° | — | — |
| 1995 | 98° | 72° | 85° | — | — |
| 1994 | 87° | 76° | 81° | — | — |
| 1993 | 102° | 67° | 84° | — | — |
| 1992 | 93° | 74° | 83° | — | — |
| 1991 | 90° | 69° | 79° | — | — |
| 1990 | 92° | 69° | 80° | — | — |
| 1989 | 98° | 59° | 79° | — | — |
| 1988 | 90° | 73° | 81° | — | — |
| 1987 | 92° | 72° | 82° | 0.1" | — |
| 1986 | 91° | 71° | 81° | — | — |
| 1985 | 88° | 60° | 74° | — | — |
| 1984 | 96° | 73° | 85° | 0.33" | — |
| 1983 | 98° | 72° | 85° | — | — |
| 1982 | 96° | 71° | 84° | — | — |
| 1981 | 96° | 72° | 84° | — | — |
| 1980 | 99° | 70° | 84° | — | — |
| 1979 | 101° | 68° | 84° | — | — |
| 1978 | 97° | 60° | 78° | 0.05" | — |
| 1977 | 96° | 65° | 80° | — | — |
| 1976 | 95° | 72° | 83° | — | — |
| 1975 | 97° | 69° | 83° | — | — |
| 1974 | 87° | 63° | 75° | 0.3" | — |
| 1973 | 100° | 71° | 86° | — | — |
| 1972 | 94° | 58° | 76° | — | — |
| 1971 | 89° | 57° | 73° | — | — |
55 years of data from TUCSON WFO