Weather on September 21
Huntsville, AL
55 Years of Data
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.
| 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° | — | — |
Huntsville, AL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Huntsville, AL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Huntsville, AL 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 Huntsville, AL
Huntsville, AL has no months that meet our "pleasant" threshold — every season has tradeoffs.