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Weather in Slidell, LA · National Weather Service + NOAA

Slidell stays cool in summer

Slidell has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 91°, a January night drops to 42°, and snow is almost unheard of. A typical November afternoon reaches 70°, and nights fall to 49°.

Winter 64°/44°Spring 78°/58°Summer 90°/73°Fall 79°/59°
Right now
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Sunrise 7:14 am · sunset 6:11 pm

Getting the latest forecast from the National Weather Service…

What stands out about Slidell’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Cool summersJuly afternoons average 91°, cooler than 443 of 483 Louisiana towns.Snow is rareAbout 0.1 inches in a normal year, so most winters see none.A wet climate65 inches of rain and melted snow a year, more than 99% of U.S. towns.Plenty of 90° daysAbout 64 days a year reach 90°.
A normal year

Where today sits in Slidell’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
64° / 44°
Snow is rare
Spring
78° / 58°
Last frost around Feb 24
Summer
90° / 73°
64 days reach 90° in a normal year
Fall now
79° / 59°
First frost around Dec 1
29 daysuntil the usual first frost (Dec 1)
Best months to be outside
FebMarAprOctNovDec
Highs of 62–84° and lows of 40° or more
How much snow does Slidell get?Almost none.When is it wettest?July, with 7.2 inches.Is it warmer than it used to be?+0.9° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Slidell.

Town Square →
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TT Weaver · Sep 30

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Slidell itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Slidell, LA (2 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.