Slidell, Louisiana Weather
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Climate of Slidell: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Slidell, with average daytime highs around 33°C. January is the coolest, when nights typically fall to about 4°C.
The area receives about 1580 mm of rain in a typical year. Most of it falls from December to October (around 95% of the yearly total), and August is the wettest month at roughly 182 mm.
For outdoor plans and travel, November usually offers the most comfortable weather in Slidell, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 16° | 4° | 109 mm | 84% |
| Feb | 18° | 7° | 119 mm | 84% |
| Mar | 22° | 10° | 118 mm | 82% |
| Apr | 25° | 14° | 129 mm | 81% |
| May | 29° | 18° | 125 mm | 79% |
| Jun | 32° | 22° | 176 mm | 78% |
| Jul | 33° | 23° | 170 mm | 80% |
| Aug | 33° | 23° | 182 mm | 80% |
| Sep | 31° | 20° | 126 mm | 81% |
| Oct | 26° | 14° | 107 mm | 81% |
| Nov | 21° | 9° | 83 mm | 83% |
| Dec | 17° | 6° | 140 mm | 86% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Slidell. Values describe typical conditions, not a forecast.
About Slidell weather
Slidell lies in Louisiana's humid subtropical, Gulf Coast climate with real hurricane exposure (June–November) — about 46 km north-east of New Orleans. Expect hot, very humid summers (June–September) with highs often above 33°C. Winter brings mild, short winters (December–February). This page shows live, auto-refreshing weather for Slidell: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Slidell is about 46 km north-east of New Orleans, in Louisiana.
Slidell sees mild, short winters (December–February).
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Slidell's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Slidell, with average daytime highs of about 33°C and nights around 23°C.
The coldest nights come in January, when the average low is about 4°C and daytime highs reach around 16°C.
Slidell receives about 1580 mm of rain in a typical year. August is the wettest month at roughly 182 mm, and the main rainy period is December to October.
November usually offers the most comfortable weather in Slidell, with mild daytime temperatures and little rain.
In November Slidell typically sees daytime highs near 21°C and lows near 9°C, with about 83 mm of rain over the month and average humidity around 83%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Slidell updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Slidell's day-to-day weather follows the broader pattern of Louisiana described above. See the hourly weather forecast or the air quality index for more detail.