Slidell weather in May: Slidell, Louisiana: normal highs, lows, rain and records for May
Slidell in May has a normal high of 85°F and a normal low of 64°F, a daily mean of 74°F, rising from 81°F on the 1st to 88°F by the 31st. Measurable precipitation falls on 8 days in a normal May, 5.46 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 18°C, 139 mm of precipitation in May.
- 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 May?
The normal high is 85°F and the normal low 64°F, for a daily mean of 74.3°F. May is 7.3°F warmer than April and 6.0°F cooler than June. May is the 5th warmest month of the year in Slidell and the 5th wettest. Across the month the normal high rises 7°F, from 81°F on May 1 to 88°F on May 31. From one year to the next May's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Mays in three average between 72°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 81°F | 60°F | 26% | 17% |
| May 8 | 83°F | 62°F | 26% | 17% |
| May 15 | 85°F | 64°F | 27% | 18% |
| May 22 | 86°F | 66°F | 30% | 20% |
| May 31 | 88°F | 68°F | 34% | 22% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 81°F | 60°F | 26% | 17% | 13 h 20 min |
| May 2 | 82°F | 60°F | 25% | 17% | 13 h 20 min |
| May 3 | 82°F | 60°F | 25% | 17% | 13 h 20 min |
| May 4 | 82°F | 61°F | 25% | 17% | 13 h 20 min |
| May 5 | 82°F | 61°F | 25% | 17% | 13 h 30 min |
| May 6 | 83°F | 61°F | 25% | 17% | 13 h 30 min |
| May 7 | 83°F | 61°F | 25% | 17% | 13 h 30 min |
| May 8 | 83°F | 62°F | 26% | 17% | 13 h 30 min |
| May 9 | 83°F | 62°F | 26% | 17% | 13 h 30 min |
| May 10 | 84°F | 62°F | 26% | 17% | 13 h 30 min |
| May 11 | 84°F | 62°F | 26% | 17% | 13 h 30 min |
| May 12 | 84°F | 63°F | 26% | 17% | 13 h 40 min |
| May 13 | 84°F | 63°F | 27% | 18% | 13 h 40 min |
| May 14 | 85°F | 63°F | 27% | 18% | 13 h 40 min |
| May 15 | 85°F | 64°F | 27% | 18% | 13 h 40 min |
| May 16 | 85°F | 64°F | 28% | 18% | 13 h 40 min |
| May 17 | 85°F | 64°F | 28% | 18% | 13 h 40 min |
| May 18 | 86°F | 64°F | 28% | 19% | 13 h 40 min |
| May 19 | 86°F | 65°F | 29% | 19% | 13 h 40 min |
| May 20 | 86°F | 65°F | 29% | 19% | 13 h 50 min |
| May 21 | 86°F | 65°F | 29% | 19% | 13 h 50 min |
| May 22 | 86°F | 66°F | 30% | 20% | 13 h 50 min |
| May 23 | 87°F | 66°F | 30% | 20% | 13 h 50 min |
| May 24 | 87°F | 66°F | 31% | 20% | 13 h 50 min |
| May 25 | 87°F | 66°F | 31% | 20% | 13 h 50 min |
| May 26 | 87°F | 67°F | 32% | 21% | 13 h 50 min |
| May 27 | 87°F | 67°F | 32% | 21% | 13 h 50 min |
| May 28 | 88°F | 67°F | 33% | 21% | 13 h 50 min |
| May 29 | 88°F | 67°F | 33% | 22% | 14 h |
| May 30 | 88°F | 68°F | 34% | 22% | 14 h |
| May 31 | 88°F | 68°F | 34% | 22% | 14 h |
- Normal high
- 85°FMay average
- Normal low
- 64°FMay average
- Precipitation
- 5.46 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h 20 min to 14 hMay 1 to May 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 27
- Sunshine
- 83%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 May?
On a given May day the chance of 0.01 inch or more is 28% on average, highest around May 31 (34%). In all, 5.46 in falls on 8 days of a normal May, 2 of them with an inch or more.
In a normal May in Slidell, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053865.
What are the records for May in Slidell?
The warmest May temperature on this station's record (since 1994) is 96°F, on May 29, 2000; the coldest is 39°F, on May 4, 2013. The wettest May brought 25.93 in (1995).
The May mean against the 1991-2020 normal of 74.3°F: 2021 74.0°F (−0.3), 2022 78.3°F (+4.0), 2023 76.6°F (+2.3), 2024 79.3°F (+5.0), 2025 75.4°F (+1.1), 2026 73.6°F (−0.7). 4 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.0°F | −0.3°F | 13.19 in |
| 2022 | 78.3°F | +4.0°F | 7.41 in |
| 2023 | 76.6°F | +2.3°F | 1.93 in |
| 2024 | 79.3°F | +5.0°F | 8.83 in |
| 2025 | 75.4°F | +1.1°F | 6.50 in |
| 2026 | 73.6°F | −0.7°F | 11.94 in |
Source: records: ACIS, station USW00053865; recent months: ACIS, station USW00053865. Records and recent months use complete months only.
How does May in Slidell compare across Louisiana?
Across the 65 places PlainClimate covers in Louisiana, May normal highs run from 81°F in Bastrop to 87°F in Chalmette; Slidell's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.