Slidell weather in July: Slidell, Louisiana: normal highs, lows, rain and records for July
Slidell in July 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 July, 7.25 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 23°C, 184 mm of precipitation in July.
- 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 July?
The normal high is 91°F and the normal low 73°F, for a daily mean of 82.1°F. July is 1.8°F warmer than June and 0.0°F cooler than August. July is the warmest month of the year in Slidell and the wettest. Across the month the normal high rises 1°F, from 91°F on July 1 to 92°F on July 31. From one year to the next July's mean temperature typically moves about 1.1°F either way (NOAA's standard deviation), so roughly two Julys in three average between 81°F and 83°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 47%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 91°F | 73°F | 44% | 29% |
| July 8 | 91°F | 73°F | 46% | 30% |
| July 15 | 91°F | 73°F | 47% | 31% |
| July 22 | 91°F | 73°F | 47% | 31% |
| July 31 | 92°F | 73°F | 46% | 31% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 29, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 91°F | 73°F | 44% | 29% | 14 h |
| July 2 | 91°F | 73°F | 44% | 29% | 14 h |
| July 3 | 91°F | 73°F | 45% | 29% | 14 h |
| July 4 | 91°F | 73°F | 45% | 29% | 14 h |
| July 5 | 91°F | 73°F | 45% | 29% | 14 h |
| July 6 | 91°F | 73°F | 45% | 29% | 14 h |
| July 7 | 91°F | 73°F | 45% | 30% | 14 h |
| July 8 | 91°F | 73°F | 46% | 30% | 14 h |
| July 9 | 91°F | 73°F | 46% | 30% | 14 h |
| July 10 | 91°F | 73°F | 46% | 30% | 14 h |
| July 11 | 91°F | 73°F | 46% | 30% | 14 h |
| July 12 | 91°F | 73°F | 46% | 31% | 14 h |
| July 13 | 91°F | 73°F | 46% | 31% | 14 h |
| July 14 | 91°F | 73°F | 46% | 31% | 14 h |
| July 15 | 91°F | 73°F | 47% | 31% | 14 h |
| July 16 | 91°F | 73°F | 47% | 31% | 14 h |
| July 17 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 18 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 19 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 20 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 21 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 22 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 23 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 24 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 25 | 91°F | 73°F | 47% | 31% | 13 h 50 min |
| July 26 | 91°F | 73°F | 47% | 31% | 13 h 40 min |
| July 27 | 91°F | 73°F | 47% | 31% | 13 h 40 min |
| July 28 | 91°F | 73°F | 47% | 31% | 13 h 40 min |
| July 29 | 92°F | 73°F | 46% | 31% | 13 h 40 min |
| July 30 | 92°F | 73°F | 46% | 31% | 13 h 40 min |
| July 31 | 92°F | 73°F | 46% | 31% | 13 h 40 min |
- Normal high
- 91°FJuly average
- Normal low
- 73°FJuly average
- Precipitation
- 7.25 inmonth total
- Days with precipitation
- 140.01 inch or more
- Days at 90°F or more
- 22
- Daylight
- 14 h to 13 h 40 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 78%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 July?
On a given July day the chance of 0.01 inch or more is 46% on average, highest around July 17 (47%). In all, 7.25 in falls on 14 days of a normal July, 2 of them with an inch or more.
In a normal July in Slidell, 22 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053865.
What are the records for July in Slidell?
The warmest July temperature on this station's record (since 1994) is 101°F, on July 31, 2023; the coldest is 64°F, on July 30, 1994. The wettest July brought 11.81 in (2020).
The July mean against the 1991-2020 normal of 82.1°F: 2021 82.8°F (+0.7), 2022 83.7°F (+1.6), 2023 85.9°F (+3.8), 2024 84.9°F (+2.8), 2025 82.7°F (+0.6), 2026 83.4°F (+1.3). 6 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 82.8°F | +0.7°F | 8.51 in |
| 2022 | 83.7°F | +1.6°F | 9.91 in |
| 2023 | 85.9°F | +3.8°F | 5.11 in |
| 2024 | 84.9°F | +2.8°F | 7.19 in |
| 2025 | 82.7°F | +0.6°F | 3.24 in |
| 2026 | 83.4°F | +1.3°F | 2.63 in |
Source: records: ACIS, station USW00053865; recent months: ACIS, station USW00053865. Records and recent months use complete months only.
How does July in Slidell compare across Louisiana?
Across the 65 places PlainClimate covers in Louisiana, July normal highs run from 89°F in Boothville to 95°F in Natchitoches; Slidell's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.