Huntsville, AL weather in September
September in Huntsville: warm and often humid, with some rain. Highs 87°F, lows 63°F, rain on about 7 days.
- Normal high
- 87°F
- Normal low
- 63°F
- Wet days
- 7
- 3.5 in total
- Muggy days
- 12
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 90°F | 82°F |
| Normal low | 68°F | 58°F |
| Chance of a wet day | 25% | 24% |
| Sunrise / sunset | 6:19 am / 7:13 pm | 6:40 am / 6:32 pm |
| Daylight | 12.9 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical September day
- 6 am65°Fdew point 62°F
- 9 am75°Fdew point 63°F
- Noon82°Fdew point 62°F
- 3 pm83°Fdew point 61°F
- 6 pm77°Fdew point 62°F
- 9 pm70°Fdew point 63°F
NOAA hourly normals (local standard time) from Huntsville Intl Airport (13 mi away); average wind 6 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F4 of 30
- Hot dayshigh 90°F or more9 of 30
- Muggy daysdaily mean dew point 65°F or more12 of 30
- Wet daysat least 0.01 in of rain or melted snow7 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.5 in; a dry September brings about 1.4 in and a wet one about 5.4 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 95°F
- Coolest September1996: average high 80°F
- Wettest September1996: 7.9 in
- Driest September2019: 0.3 in
- Highest reading101°F (September 5, 1999)
- Lowest reading38°F (September 26, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 91°F | 87°F | 76°F |
| Normal low | 70°F | 63°F | 52°F |
| Wet days | 9 | 7 | 8 |
| Comfortable days | 0 | 4 | 15 |
| Daylight | 13.4 h | 12.4 h | 11.3 h |
Highs change by -4°F from August and -11°F into October.
Nearby alternatives in September
- Cooler: Gatlinburg, TN186 mi · high 78°F · 11 wet days
How Huntsville ranks in September
- Normal high123rd warmest of 378 cities; 5th of 6 in Alabama
- Wet days139th driest of 378
- Comfortable days213th most of 342
What to pack for Huntsville in September
- Light, breathable clothing – highs near 87°F and about 12 muggy days
Heating and cooling
September has 8 heating degree days and 306 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is Huntsville in September?
The normal high is 87°F and the normal low is 63°F. From 1991 to 2020 the hottest September reading was 101°F (September 5, 1999).
Does it rain a lot in Huntsville in September?
About 7 days in September have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest September in 1991-2020 was in 1996 (7.9 in); the driest was in 2019 (0.3 in).
Is September a good time to visit Huntsville?
September ranks 7th of 12 months on our comfort score for Huntsville (50 out of 100). It has about 4 comfortable days and about 9 days at 90°F or hotter. The best month is April.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Huntsville Intl Airport (USW00003856), 13 mi WSW of the city center, 624 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Huntsville Intl/C.t.jones Field Airport (723230-03856), 13 mi WSW of the city center, 623 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).