Decatur weather in September: Decatur, Alabama: normal highs, lows, rain and records for September
Decatur in September has a normal high of 85°F and a normal low of 61°F, a daily mean of 73°F, falling from 89°F on the 1st to 81°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 3.21 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 16°C, 82 mm of precipitation in September.
- NOAA stationDecatur Pryor Field
- Station IDUSW00053852
- Location34.65°N 86.95°W
- Elevation592 ft (180 m)
- Population57,974
- Jan 51° 32°
- Feb 55° 35°
- Mar 64° 42°
- Apr 73° 50°
- May 81° 59°
- Jun 88° 67°
- Jul 90° 70°
- Aug 90° 68°
- Sep 85° 61°
- Oct 75° 50°
- Nov 62° 39°
- Dec 54° 35°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Decatur in September?
The normal high is 85°F and the normal low 61°F, for a daily mean of 73.1°F. September is 5.7°F cooler than August and 11.1°F warmer than October. September is the 4th warmest month of the year in Decatur and the 11th wettest. Across the month the normal high falls 8°F, from 89°F on September 1 to 81°F on September 30. From one year to the next September's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 71°F and 76°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 89°F | 65°F | 31% | 15% |
| September 8 | 87°F | 64°F | 29% | 13% |
| September 15 | 86°F | 62°F | 28% | 13% |
| September 22 | 84°F | 59°F | 28% | 13% |
| September 30 | 81°F | 56°F | 28% | 13% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 89°F | 65°F | 31% | 15% | 13 h |
| September 2 | 88°F | 65°F | 31% | 14% | 12 h 50 min |
| September 3 | 88°F | 65°F | 30% | 14% | 12 h 50 min |
| September 4 | 88°F | 65°F | 30% | 14% | 12 h 50 min |
| September 5 | 88°F | 64°F | 30% | 14% | 12 h 50 min |
| September 6 | 88°F | 64°F | 30% | 14% | 12 h 50 min |
| September 7 | 87°F | 64°F | 29% | 13% | 12 h 40 min |
| September 8 | 87°F | 64°F | 29% | 13% | 12 h 40 min |
| September 9 | 87°F | 63°F | 29% | 13% | 12 h 40 min |
| September 10 | 87°F | 63°F | 29% | 13% | 12 h 40 min |
| September 11 | 87°F | 63°F | 29% | 13% | 12 h 40 min |
| September 12 | 86°F | 63°F | 29% | 13% | 12 h 30 min |
| September 13 | 86°F | 62°F | 28% | 13% | 12 h 30 min |
| September 14 | 86°F | 62°F | 28% | 13% | 12 h 30 min |
| September 15 | 86°F | 62°F | 28% | 13% | 12 h 30 min |
| September 16 | 85°F | 61°F | 28% | 13% | 12 h 20 min |
| September 17 | 85°F | 61°F | 28% | 13% | 12 h 20 min |
| September 18 | 85°F | 61°F | 28% | 13% | 12 h 20 min |
| September 19 | 84°F | 60°F | 28% | 13% | 12 h 20 min |
| September 20 | 84°F | 60°F | 28% | 13% | 12 h 20 min |
| September 21 | 84°F | 60°F | 28% | 13% | 12 h 10 min |
| September 22 | 84°F | 59°F | 28% | 13% | 12 h 10 min |
| September 23 | 83°F | 59°F | 28% | 13% | 12 h 10 min |
| September 24 | 83°F | 59°F | 28% | 13% | 12 h 10 min |
| September 25 | 83°F | 58°F | 28% | 13% | 12 h 10 min |
| September 26 | 82°F | 58°F | 28% | 13% | 12 h |
| September 27 | 82°F | 57°F | 28% | 13% | 12 h |
| September 28 | 82°F | 57°F | 28% | 13% | 12 h |
| September 29 | 81°F | 57°F | 28% | 13% | 12 h |
| September 30 | 81°F | 56°F | 28% | 13% | 11 h 50 min |
- Normal high
- 85°FSeptember average
- Normal low
- 61°FSeptember average
- Precipitation
- 3.21 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 9
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 25
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053852; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Decatur in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 1 (31%). In all, 3.21 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Decatur, 9 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053852.
What are the records for September in Decatur?
The September mean against the 1991-2020 normal of 73.1°F: 2021 72.1°F (−1.0), 2022 71.4°F (−1.7), 2023 74.2°F (+1.1), 2024 74.9°F (+1.8), 2026 79.3°F (+6.2). 3 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.1°F | −1.0°F | 4.32 in |
| 2022 | 71.4°F | −1.7°F | 3.43 in |
| 2023 | 74.2°F | +1.1°F | 1.47 in |
| 2024 | 74.9°F | +1.8°F | 4.24 in |
| 2026 | 79.3°F | +6.2°F | 0.76 in |
Source: recent months: ACIS, station USW00053852. Records and recent months use complete months only.
How does September in Decatur compare across Alabama?
Across the 80 places PlainClimate covers in Alabama, September normal highs run from 81°F in Valley Head to 90°F in Eufaula; Decatur's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.