Weather on September 20
Phoenix, AZ
55 Years of Data
About This Date
September 20th in Phoenix, AZ typically brings hot fall weather, with average highs around 98°F and lows near 69°F — a 29°F daily swing. Over 56 years of records, the warmest September 20th was in 2010 (96°F average), while the coldest was 1985 (70°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 9% of September 20th dates historically, with the wettest September 20th recording 1.17" 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 20th in Phoenix, AZ? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 101° | 76° | 88° | — | — |
| 2025 | 95° | 77° | 86° | — | — |
| 2024 | 95° | 72° | 83° | — | — |
| 2023 | 95° | 69° | 82° | — | — |
| 2022 | 94° | 74° | 84° | — | — |
| 2021 | 98° | 70° | 84° | — | — |
| 2020 | 104° | 72° | 88° | — | — |
| 2019 | 97° | 71° | 84° | — | — |
| 2018 | 96° | 70° | 83° | — | — |
| 2017 | 97° | 67° | 82° | — | — |
| 2016 | 93° | 78° | 86° | 0.03" | — |
| 2015 | 98° | 79° | 88° | — | — |
| 2014 | 97° | 76° | 86° | — | — |
| 2013 | 102° | 68° | 85° | — | — |
| 2012 | 104° | 74° | 89° | — | — |
| 2011 | 103° | 69° | 86° | — | — |
| 2010warmest | 109° | 83° | 96° | — | — |
| 2009 | 100° | 73° | 87° | — | — |
| 2008 | 100° | 76° | 88° | — | — |
| 2007 | 96° | 67° | 81° | — | — |
| 2006 | 95° | 73° | 84° | — | — |
| 2005 | 104° | 78° | 91° | — | — |
| 2004 | 88° | 66° | 77° | — | — |
| 2003 | 102° | 68° | 85° | — | — |
| 2002 | 97° | 67° | 82° | — | — |
| 2001 | 103° | 72° | 87° | — | — |
| 2000 | 102° | 78° | 90° | — | — |
| 1999 | 98° | 70° | 84° | 0.55" | — |
| 1998 | 104° | 70° | 87° | — | — |
| 1997 | 103° | 75° | 89° | — | — |
| 1996 | 96° | 64° | 80° | — | — |
| 1995 | 104° | 72° | 88° | — | — |
| 1994 | 100° | 78° | 89° | — | — |
| 1993 | 98° | 57° | 78° | — | — |
| 1992 | 96° | 70° | 83° | 1.17" | — |
| 1991 | 95° | 76° | 85° | — | — |
| 1990 | 92° | 68° | 80° | 0.07" | — |
| 1989 | 88° | 58° | 73° | — | — |
| 1988 | 97° | 64° | 80° | — | — |
| 1987 | 100° | 66° | 83° | — | — |
| 1986 | 93° | 66° | 80° | — | — |
| 1985coldest | 82° | 57° | 70° | — | — |
| 1984 | 102° | 73° | 88° | — | — |
| 1983 | 93° | 75° | 84° | 0.12" | — |
| 1982 | 102° | 67° | 84° | — | — |
| 1981 | 100° | 70° | 85° | — | — |
| 1980 | 98° | 67° | 82° | — | — |
| 1979 | 103° | 67° | 85° | — | — |
| 1978 | 91° | 53° | 72° | — | — |
| 1977 | 95° | 60° | 78° | — | — |
| 1976 | 98° | 67° | 82° | — | — |
| 1975 | 102° | 69° | 86° | — | — |
| 1974 | 96° | 64° | 80° | — | — |
| 1973 | 99° | 63° | 81° | — | — |
| 1972 | 97° | 56° | 76° | — | — |
| 1971 | 92° | 54° | 73° | — | — |
Phoenix, AZ Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Phoenix, AZ Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Phoenix, AZ Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Phoenix, AZ
Most pleasant months in Phoenix, AZ: January, February, March, November, December.
What to expect on September 20th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 20th outlook →