Slidell weather in March

In March, Slidell sees average daytime highs of 67°F and overnight lows near 56°F, with 4.8 in of precipitation across 9.2 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 65°F in the first days to 70°F by the end. The sky is clear or mostly clear about 39% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is Slidell's 6th-clearest and 2nd-windiest month. For the whole year in context, see Slidell's year-round climate.

Daytime high
67°
8th warmest
Overnight low
56°
5th coldest
Precipitation
4.8 in
9.2 wet days
Daylight
11 h 48 min
6:16 AM – 6:02 PM
Cloud cover
53%
6th clearest
Wind
9 mph
2nd windiest
Solar energy
4.72 kWh/m²
Travel score
6.5
out of 10

Slidell is city in St. Tammany Parish, Louisiana, United States.

Density
32,119/km²
people per km²
Founded
1882

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 65°F in the first days to 70°F by the end.

A typical March day in Slidell reaches about 67°F in the afternoon and slips back to 56°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 74°F. Set against its neighbours, March runs about 6°F warmer than February and about 6°F cooler than April.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16453
26553
36554
46554
56554
66554
76554
86555
96655
106655
116655
126655
136756
146756
156756
166756
176857
186857
196857
206858
216958
226958
236958
246959
257059
267059
277059
287059
297060
307160
317160

How March really feels in Slidell

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Slidell weather by month

How March compares with the rest of the year at a glance. March is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 47°4.59.310.34.6
Feb62° / 51°4.48.710.95.4
Mar67° / 56°4.89.211.86.5
Apr73° / 63°3.88.712.77.1
May80° / 71°3.59.913.56.8
Jun85° / 76°4.91513.94.7
Jul87° / 78°5.118.113.84.0
Aug87° / 78°5.917.913.14.0
Sep83° / 74°4.712.512.25.5
Oct76° / 65°3.47.611.37.5
Nov67° / 55°3.3710.56.9
Dec61° / 50°4.09.110.15.2

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 14% of March, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24753
34753
44753
54852
64852
74951
84951
94951
104951
115050
125050
135050
145149
155248
165347
175446
185545
195644
205644
215743
225743
235743
245842
255842
265842
275842
285842
295743
305644
315644

Chance of precipitation in March

Any precipitation

Slidell gets around 4.8 in of rain and snow over 9.2 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 32% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
331
431
531
631
730
830
930
1030
1130
1229
1329
1429
1528
1628
1728
1827
1927
2027
2127
2227
2327
2427
2527
2627
2728
2828
2929
3029
3130

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, March lands in the dry band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
158132081
258132090
358132090
458132090
5571320100
6561420100
7551421100
8541521100
9531521110
10521522110
11511622110
12491723120
13481723120
14471823120
15451823130
16441824131
17431824141
18421824151
19411924161
20401924161
21391824171
22381824191
23381823201
24371823211
25371822221
26361822231
27361821242
28361821242
29351720252
30351720262
31341719273

Wind in March

Winds average 9 mph in March.

Across March, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 18 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over March. Sunrise moves from 6:33 AM to 5:57 AM, and sunset from 5:52 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:335:52
211.36:325:52
311.46:315:53
411.46:305:54
511.46:295:55
611.56:275:55
711.56:265:56
811.56:255:57
911.66:245:57
1011.66:235:58
1111.66:225:59
1211.66:205:59
1311.76:196:00
1411.76:186:01
1511.76:176:01
1611.86:166:02
1711.86:146:03
1811.86:136:03
1911.96:126:04
2011.96:116:05
2111.96:096:05
2212.06:086:06
2312.06:076:06
2412.06:066:07
2512.16:046:08
2612.16:036:08
2712.16:026:09
2812.16:016:10
2912.25:596:10
3012.25:586:11
3112.25:576:11

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.72 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 6.27 kWh/m² in May across the year — March's 4.72 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.2Bright
34.2Bright
44.2Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.5Bright
134.6Bright
144.6Bright
154.7Bright
164.7Bright
174.8Bright
184.8Bright
194.8Bright
204.9Bright
214.9Bright
225.0Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.1Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in March

Hazard calendar for Slidell

In seasonPeak

None of Slidell's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Slidell sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is March a good time to visit Slidell?

Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.5
Sightseeing
5th-best month of the year
3.2
Beach & pool
9th-best month of the year

March is a reasonable time to visit Slidell for sightseeing.

What to pack for Slidell in March

From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In March, Slidell sees daytime highs around 67°F and nights near 56°F. Worth packing: rain gear and sun protection. About 9 days see rain.

rain gearsun protection

Sea temperature near Slidell in March

The nearest coast averages about 64°F in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 12 mi away) is warmest in August at about 86°F and coldest in January near 57°F.

It's comfortable for a long swim from Apr 5 to Nov 10 — about 7.2 months when the water holds above 68°F.

50°60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan57Bracing
Feb58Bracing
Mar64Cool
Apr71Refreshing
May78Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep83Tropical
Oct75Warm
Nov67Cool
Dec60Cool

UV index in Slidell in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Slidell peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJul 12UV 10Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar6High
Apr10Very high
May10Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Slidell in March

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.

Air quality in Slidell is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1621 µg/m³Nov 238 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr10Good
May13Moderate
Jun18Moderate
Jul22Moderate
Aug17Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Slidell?

Slidell sits at 30.3°N, 89.8°W, 3 ft above sea level, in United States. The nearest listed city is Chalmette, 25 mi away.

Topography around Slidell

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Slidell.

Within 2 miles, the terrain around Slidell has only modest variations in elevation — a maximum elevation change of 62 ft around an average of 16 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 118 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 423 ft.

The land around Slidell is covered by trees (56%) and artificial surfaces (25%) within 2 miles, trees (52%) and water (26%) within 10 miles, and trees (44%) and water (34%) within 50 miles.

2 miles
62 ft
10 miles
118 ft
50 miles
423 ft
treesgrasslandartificial surfacesbare terrainwaterwetland
March weather nearby: Chalmette 25 mi · New Orleans 28 mi · Terrytown 29 mi · Gretna 30 mi · Metairie 30 mi · Metairie Terrace 30 mi · Harvey 31 mi · Marrero 32 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Slidell (30.2752°, -89.7812°, elevation 3 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).