Slidell weather in August: Slidell, Louisiana: normal highs, lows, rain and records for August
Slidell in August has a normal high of 91°F and a normal low of 73°F, a daily mean of 82°F, holding near 91°F all month. Measurable precipitation falls on 14 days in a normal August, 6.96 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 23°C, 177 mm of precipitation in August.
- NOAA stationSlidell Airport
- Station IDUSW00053865
- Location30.34°N 89.82°W
- Elevation27 ft (8 m)
- Population28,440
- Jan 62° 41°
- Feb 66° 44°
- Mar 72° 50°
- Apr 78° 56°
- May 85° 64°
- Jun 90° 71°
- Jul 91° 73°
- Aug 91° 73°
- Sep 88° 69°
- Oct 81° 57°
- Nov 71° 47°
- Dec 64° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Slidell in August?
The normal high is 91°F and the normal low 73°F, for a daily mean of 82.1°F. August is 0.0°F warmer than July and 3.9°F warmer than September. August is the warmest month of the year in Slidell and the 2nd wettest. Across the month the normal high falls 2°F, from 92°F on August 1 to 90°F on August 31. From one year to the next August's mean temperature typically moves about 1.5°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 81°F and 84°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 46%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 92°F | 73°F | 46% | 31% |
| August 8 | 92°F | 73°F | 46% | 31% |
| August 15 | 91°F | 73°F | 45% | 30% |
| August 22 | 91°F | 73°F | 43% | 29% |
| August 31 | 90°F | 72°F | 41% | 27% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 4, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 92°F | 73°F | 46% | 31% | 13 h 40 min |
| August 2 | 92°F | 73°F | 46% | 31% | 13 h 40 min |
| August 3 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 4 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 5 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 6 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 7 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 8 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 9 | 92°F | 73°F | 46% | 31% | 13 h 30 min |
| August 10 | 92°F | 73°F | 46% | 31% | 13 h 20 min |
| August 11 | 92°F | 73°F | 46% | 31% | 13 h 20 min |
| August 12 | 92°F | 73°F | 46% | 31% | 13 h 20 min |
| August 13 | 92°F | 73°F | 45% | 30% | 13 h 20 min |
| August 14 | 91°F | 73°F | 45% | 30% | 13 h 20 min |
| August 15 | 91°F | 73°F | 45% | 30% | 13 h 20 min |
| August 16 | 91°F | 73°F | 45% | 30% | 13 h 20 min |
| August 17 | 91°F | 73°F | 45% | 30% | 13 h 10 min |
| August 18 | 91°F | 73°F | 44% | 30% | 13 h 10 min |
| August 19 | 91°F | 73°F | 44% | 29% | 13 h 10 min |
| August 20 | 91°F | 73°F | 44% | 29% | 13 h 10 min |
| August 21 | 91°F | 73°F | 44% | 29% | 13 h 10 min |
| August 22 | 91°F | 73°F | 43% | 29% | 13 h 10 min |
| August 23 | 91°F | 73°F | 43% | 29% | 13 h |
| August 24 | 91°F | 73°F | 43% | 28% | 13 h |
| August 25 | 91°F | 72°F | 43% | 28% | 13 h |
| August 26 | 91°F | 72°F | 42% | 28% | 13 h |
| August 27 | 91°F | 72°F | 42% | 28% | 13 h |
| August 28 | 91°F | 72°F | 42% | 27% | 13 h |
| August 29 | 91°F | 72°F | 42% | 27% | 12 h 50 min |
| August 30 | 90°F | 72°F | 41% | 27% | 12 h 50 min |
| August 31 | 90°F | 72°F | 41% | 27% | 12 h 50 min |
- Normal high
- 91°FAugust average
- Normal low
- 73°FAugust average
- Precipitation
- 6.96 inmonth total
- Days with precipitation
- 140.01 inch or more
- Days at 90°F or more
- 23
- Daylight
- 13 h 40 min to 12 h 50 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053865; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Slidell in August?
On a given August day the chance of 0.01 inch or more is 44% on average, highest around August 1 (46%). In all, 6.96 in falls on 14 days of a normal August, 2 of them with an inch or more.
In a normal August in Slidell, 23 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053865.
What are the records for August in Slidell?
The warmest August temperature on this station's record (since 1994) is 108°F, on August 26, 2023; the coldest is 58°F, on August 27, 2015. The wettest August brought 20.78 in (2012).
The August mean against the 1991-2020 normal of 82.1°F: 2021 83.1°F (+1.0), 2022 82.8°F (+0.7), 2023 88.5°F (+6.4), 2024 84.9°F (+2.8), 2025 81.7°F (−0.4), 2026 83.8°F (+1.7). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 83.1°F | +1.0°F | 17.02 in |
| 2022 | 82.8°F | +0.7°F | 6.55 in |
| 2023 | 88.5°F | +6.4°F | 1.79 in |
| 2024 | 84.9°F | +2.8°F | 3.82 in |
| 2025 | 81.7°F | −0.4°F | 6.94 in |
| 2026 | 83.8°F | +1.7°F | 2.48 in |
Source: records: ACIS, station USW00053865; recent months: ACIS, station USW00053865. Records and recent months use complete months only.
How does August in Slidell compare across Louisiana?
Across the 65 places PlainClimate covers in Louisiana, August normal highs run from 89°F in Boothville to 96°F in Natchitoches; Slidell's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.