Decatur weather in August: Decatur, Alabama: normal highs, lows, rain and records for August
Decatur in August has a normal high of 90°F and a normal low of 68°F, a daily mean of 79°F, holding near 90°F all month. Measurable precipitation falls on 11 days in a normal August, 3.05 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 20°C, 77 mm of precipitation in August.
- 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 August?
The normal high is 90°F and the normal low 68°F, for a daily mean of 78.8°F. August is 0.9°F cooler than July and 5.7°F warmer than September. August is the 2nd warmest month of the year in Decatur and the 12th wettest. Across the month the normal high falls 1°F, from 90°F on August 1 to 89°F on August 31. From one year to the next August's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 76°F and 81°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 90°F | 70°F | 36% | 20% |
| August 8 | 90°F | 69°F | 35% | 19% |
| August 15 | 90°F | 68°F | 34% | 18% |
| August 22 | 90°F | 67°F | 33% | 17% |
| August 31 | 89°F | 66°F | 31% | 15% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 7, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 90°F | 70°F | 36% | 20% | 13 h 50 min |
| August 2 | 90°F | 69°F | 36% | 20% | 13 h 50 min |
| August 3 | 90°F | 69°F | 36% | 20% | 13 h 50 min |
| August 4 | 90°F | 69°F | 35% | 19% | 13 h 50 min |
| August 5 | 90°F | 69°F | 35% | 19% | 13 h 50 min |
| August 6 | 90°F | 69°F | 35% | 19% | 13 h 50 min |
| August 7 | 90°F | 69°F | 35% | 19% | 13 h 40 min |
| August 8 | 90°F | 69°F | 35% | 19% | 13 h 40 min |
| August 9 | 90°F | 69°F | 35% | 19% | 13 h 40 min |
| August 10 | 90°F | 69°F | 35% | 19% | 13 h 40 min |
| August 11 | 90°F | 69°F | 35% | 18% | 13 h 40 min |
| August 12 | 90°F | 69°F | 34% | 18% | 13 h 40 min |
| August 13 | 90°F | 69°F | 34% | 18% | 13 h 30 min |
| August 14 | 90°F | 68°F | 34% | 18% | 13 h 30 min |
| August 15 | 90°F | 68°F | 34% | 18% | 13 h 30 min |
| August 16 | 90°F | 68°F | 34% | 18% | 13 h 30 min |
| August 17 | 90°F | 68°F | 34% | 18% | 13 h 30 min |
| August 18 | 90°F | 68°F | 34% | 17% | 13 h 20 min |
| August 19 | 90°F | 68°F | 34% | 17% | 13 h 20 min |
| August 20 | 90°F | 68°F | 33% | 17% | 13 h 20 min |
| August 21 | 90°F | 67°F | 33% | 17% | 13 h 20 min |
| August 22 | 90°F | 67°F | 33% | 17% | 13 h 20 min |
| August 23 | 90°F | 67°F | 33% | 16% | 13 h 10 min |
| August 24 | 90°F | 67°F | 33% | 16% | 13 h 10 min |
| August 25 | 89°F | 67°F | 32% | 16% | 13 h 10 min |
| August 26 | 89°F | 67°F | 32% | 16% | 13 h 10 min |
| August 27 | 89°F | 66°F | 32% | 16% | 13 h 10 min |
| August 28 | 89°F | 66°F | 32% | 15% | 13 h |
| August 29 | 89°F | 66°F | 32% | 15% | 13 h |
| August 30 | 89°F | 66°F | 31% | 15% | 13 h |
| August 31 | 89°F | 66°F | 31% | 15% | 13 h |
- Normal high
- 90°FAugust average
- Normal low
- 68°FAugust average
- Precipitation
- 3.05 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 18
- Daylight
- 13 h 50 min to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 30
- Sunshine
- 81%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 August?
On a given August day the chance of 0.01 inch or more is 34% on average, highest around August 1 (36%). In all, 3.05 in falls on 11 days of a normal August, 1 of them with an inch or more.
In a normal August in Decatur, 18 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053852.
What are the records for August in Decatur?
The August mean against the 1991-2020 normal of 78.8°F: 2021 78.5°F (−0.3), 2022 78.7°F (−0.1), 2023 79.6°F (+0.8), 2024 80.9°F (+2.1), 2025 78.7°F (−0.1), 2026 79.9°F (+1.1). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.5°F | −0.3°F | 6.55 in |
| 2022 | 78.7°F | −0.1°F | 1.65 in |
| 2023 | 79.6°F | +0.8°F | 6.14 in |
| 2024 | 80.9°F | +2.1°F | 0.82 in |
| 2025 | 78.7°F | −0.1°F | 0.47 in |
| 2026 | 79.9°F | +1.1°F | 7.80 in |
Source: recent months: ACIS, station USW00053852. Records and recent months use complete months only.
How does August in Decatur compare across Alabama?
Across the 80 places PlainClimate covers in Alabama, August normal highs run from 87°F in Valley Head to 94°F in Eufaula; Decatur's is 90°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.