Slidell, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Slidell, a city in St. Tammany County, Louisiana.
Today
94°F
Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 2pm and 4pm. Sunny. High near 94, with temperatures falling to around 92 in the afternoon. West wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Slidell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 17% |
| Tonight | 76°F | Mostly Clear | 0 to 5 mph SW | 8% |
| Wednesday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 24% |
| Wednesday Night | 75°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SW | 23% |
| Thursday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 19% |
| Thursday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph NE | 19% |
| Friday | 92°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph E | 22% |
| Friday Night | 74°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 22% |
| Saturday | 92°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 22% |
| Saturday Night | 75°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 22% |
| Sunday | 92°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 45% |
| Sunday Night | 75°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph SE | 45% |
| Monday | 91°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 50% |
| Monday Night | 75°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 50% |
Forecast source: National Weather Service (api.weather.gov) for Slidell (30.289, -89.783). Updated through the day.
Growing snapshot for Slidell
Last spring frost
Feb 24
First fall frost
Dec 1
Growing season
281 days
Hardiness zone
9a
More local growing data for Slidell: nearby ZIP 70458 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Abita Springs
Covington
Eden Isle
Folsom
Lacombe
Lewisburg
Madisonville
Mandeville
Pearl River
Rio
Sun
Climate data from the nearest NOAA station, Slidell, La (1.5 mi from Slidell). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.