Slidell, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Slidell, a city in St. Tammany County, Louisiana.
This Afternoon
80°F
Mostly Cloudy
Mostly cloudy. High near 80, with temperatures falling to around 76 in the afternoon. Southeast wind 5 to 10 mph.
7-day forecast for Slidell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Mostly Cloudy | 5 to 10 mph SE | 12% |
| Tonight | 65°F | Mostly Cloudy then Patchy Fog | 0 mph | 8% |
| Wednesday | 82°F | Slight Chance Rain Showers | 0 to 5 mph SW | 23% |
| Wednesday Night | 61°F | Partly Cloudy | 0 mph | 1% |
| Thursday | 82°F | Mostly Sunny | 0 to 5 mph S | 6% |
| Thursday Night | 60°F | Mostly Cloudy | 0 mph | 12% |
| Friday | 79°F | Chance Rain Showers | 0 to 5 mph NW | 34% |
| Friday Night | 53°F | Mostly Cloudy | 0 to 5 mph N | 8% |
| Saturday | 76°F | Mostly Sunny | 5 mph N | 7% |
| Saturday Night | 49°F | Slight Chance Rain Showers | 0 to 5 mph N | 15% |
| Sunday | 72°F | Slight Chance Rain Showers | 5 to 10 mph N | 15% |
| Sunday Night | 44°F | Partly Cloudy | 5 mph N | 7% |
| Monday | 72°F | Sunny | 5 mph N | 7% |
| Monday Night | 43°F | Mostly Clear | 0 to 5 mph N | 3% |
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 Nov 3, 2026.