Weather on September 21
Huntsville, AL
55 Years of Data
Avg High
85°F
Avg Low
60°F
Warmest
2010
80°F avg
Coldest
2006
60°F avg
About This Date
September 21st in Huntsville, AL typically brings warm fall weather, with average highs around 85°F and lows near 60°F — a 25°F daily swing. Over 26 years of records, the warmest September 21st was in 2010 (80°F average), while the coldest was 2006 (60°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 12% of September 21st dates historically, with the wettest September 21st recording 2.11" of rain.
Planning for September 21st in Huntsville, AL? 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 | 91° | 63° | 77° | — | — |
| 2024 | 92° | 64° | 78° | — | — |
| 2023 | 84° | 60° | 72° | — | — |
| 2022 | 94° | 67° | 80° | — | — |
| 2021 | 80° | 70° | 75° | 0.66" | — |
| 2020 | 75° | 56° | 65° | — | — |
| 2019 | 88° | 55° | 71° | — | — |
| 2018 | 88° | 73° | 80° | — | — |
| 2017 | 88° | 66° | 77° | — | — |
| 2016 | 93° | 65° | 79° | — | — |
| 2015 | 78° | 63° | 70° | — | — |
| 2014 | 88° | 61° | 74° | — | — |
| 2013 | 76° | 64° | 70° | — | — |
| 2012 | 79° | 46° | 62° | — | — |
| 2011 | 69° | 62° | 66° | 2.11" | — |
| 2010warmest | 100° | 61° | 80° | — | — |
| 2009 | 83° | 72° | 77° | 1.4" | — |
| 2008 | 73° | 58° | 65° | — | — |
| 2007 | 87° | 60° | 74° | — | — |
| 2006coldest | 75° | 44° | 60° | — | — |
| 2005 | 93° | 64° | 79° | — | — |
| 2004 | 78° | 48° | 63° | — | — |
| 1974 | 82° | 59° | 71° | — | — |
| 1973 | 92° | 50° | 71° | — | — |
| 1972 | 92° | 65° | 78° | — | — |
| 1971 | 80° | 56° | 68° | — | — |
26 years of data from REDSTONE ARSENAL