Slidell Climate by Month
Slidell, Louisiana, United States
Hot summers and mild winters, with rain spread through the year.
The climate in Slidell is one of hot summers and mild winters, with rain spread through the year. July is the warmest month, with highs around 92°F (33°C); January is the coolest at 62°F (17°C), and nights dip to 42°F (6°C). About 64 in (1626 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 92°F(33°C)
- Average high, July
- Coldest nights
- 42°F(6°C)
- Average low, January
- Rain per year
- 64 in(1626 mm)
- No clear rainy season
- Humidity
- 76%
- Sunniest: May
Best and worst months in Slidell
Best for weatherMarch, April and November are the best time for weather in Slidell: highs near 74°F (23°C) and about 4.4 in (112 mm) of rain a month.
Least pleasantJuly and August are the least pleasant; August is the hottest, with highs of 92°F (33°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in April.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Slidell weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 62°F(17°C) | 42°F(6°C) | 5.0 in(128 mm) | 75% | 2.7 |
| FebFebruary | 66°F(19°C) | 45°F(7°C) | 5.9 in(149 mm) | 79% | 3.3 |
| MarMarchBest | 72°F(22°C) | 51°F(11°C) | 4.8 in(122 mm) | 74% | 4.4 |
| AprAprilBest | 78°F(26°C) | 57°F(14°C) | 4.5 in(114 mm) | 73% | 5.3 |
| MayMay | 85°F(29°C) | 65°F(19°C) | 4.8 in(121 mm) | 74% | 6.2 |
| JunJune | 90°F(32°C) | 71°F(22°C) | 6.9 in(174 mm) | 76% | 5.9 |
| JulJuly | 92°F(33°C) | 73°F(23°C) | 6.5 in(166 mm) | 76% | 5.8 |
| AugAugust | 92°F(33°C) | 73°F(23°C) | 7.1 in(181 mm) | 77% | 5.6 |
| SepSeptember | 88°F(31°C) | 69°F(21°C) | 5.6 in(141 mm) | 74% | 5.0 |
| OctOctober | 81°F(27°C) | 59°F(15°C) | 3.7 in(93 mm) | 75% | 4.0 |
| NovNovemberBest | 71°F(22°C) | 49°F(9°C) | 3.9 in(100 mm) | 79% | 3.2 |
| DecDecember | 65°F(18°C) | 44°F(6°C) | 5.4 in(137 mm) | 77% | 2.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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