Marrero weather in May

In May, Marrero sees average daytime highs of 82°F and overnight lows near 70°F, with 3.6 in of rain across 9.2 wet days and about 13.5 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 79°F in the first days to 84°F by the end. The sky is clear or mostly clear about 46% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 13 h 06 min at the start of May to 13 h 48 min by month's end. Set against the rest of the year, May is Marrero's 3rd-clearest and 8th-windiest month. For the whole year in context, see Marrero's year-round climate.

Daytime high
82°
5th warmest
Overnight low
70°
8th coldest
Rainfall
3.6 in
9.2 wet days
Daylight
13 h 30 min
5:12 AM – 6:42 PM
Cloud cover
47%
3rd clearest
Wind
8 mph
8th windiest
Solar energy
6.23 kWh/m²
Travel score
6.5
out of 10

Marrero is unincorporated suburban community and census-designated place in Jefferson Parish, Louisiana, United States.

Density
1,489/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 79°F in the first days to 84°F by the end.

A typical May day in Marrero reaches about 82°F in the afternoon and slips back to 70°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 86°F. Set against its neighbours, May runs about 6°F warmer than April and about 5°F cooler than June.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
17867
27867
37967
47967
57968
68068
78068
88068
98069
108069
118169
128169
138170
148170
158270
168270
178271
188271
198271
208271
218371
228372
238372
248372
258373
268373
278473
288473
298473
308474
318474

How May really feels in Marrero

Once humidity and wind are folded in, May 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

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

Marrero weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan61° / 48°4.49.710.35.1
Feb64° / 51°4.28.810.95.8
Mar69° / 57°4.59.411.86.6
Apr75° / 63°3.98.412.77.2
May82° / 70°3.69.213.56.5
Jun86° / 76°5.215.213.94.4
Jul88° / 78°5.617.913.73.7
Aug87° / 78°6.317.413.13.8
Sep84° / 74°4.912.812.25.2
Oct77° / 65°3.5811.37.4
Nov69° / 56°3.37.310.57.0
Dec63° / 51°3.89.210.15.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36139
46238
56139
66139
76139
86139
96238
106238
116238
126238
136238
146238
156337
166436
176535
186535
196535
206535
216535
226436
236436
246436
256337
266337
276238
286238
296040
306040
316040

Chance of precipitation in May

Any precipitation

Marrero gets around 3.6 in of rain over 9.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
126
226
325
425
525
625
725
825
925
1025
1126
1226
1327
1427
1527
1628
1728
1829
1930
2030
2131
2232
2334
2435
2536
2637
2738
2840
2941
3043
3144

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
116121932210
216121931220
315111931240
414111931250
513101931260
612101931280
712101831290
81191831300
91091831320
101081731330
11981732340
12981632350
13881532360
14871532380
15771432390
16771333400
17771233411
18661233421
19661133441
20561033451
21551033471
2245932481
2344932502
2434831522
2533831532
2623730553
2723729563
2812728584
2912627604
3011625625
3101624636

Wind in May

Winds average 8 mph in May.

Across May, daily wind ranges from about 7 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
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
257light breeze
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 06 min at the start of May to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:23 AM to 5:05 AM, and sunset from 6:32 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:236:32
213.25:226:32
313.25:226:33
413.25:216:34
513.25:206:34
613.35:196:35
713.35:186:36
813.35:176:36
913.35:176:37
1013.45:166:38
1113.45:156:38
1213.45:146:39
1313.45:146:40
1413.55:136:40
1513.55:126:41
1613.55:126:42
1713.55:116:42
1813.55:106:43
1913.65:106:44
2013.65:096:44
2113.65:096:45
2213.65:086:45
2313.65:086:46
2413.75:076:47
2513.75:076:47
2613.75:076:48
2713.75:066:48
2813.75:066:49
2913.75:056:50
3013.75:056:50
3113.85:056:51

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.23 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.73 kWh/m² to a high of 6.23 kWh/m² in May across the year — May's 6.23 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Hazard calendar for Marrero

In seasonPeak

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

Marrero 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 May a good time to visit Marrero?

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

6.5
Sightseeing
5th-best month of the year
7.0
Beach & pool
1st-best month of the year

May is a reasonable time to visit Marrero for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Marrero in May

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

In May, Marrero sees daytime highs around 82°F and nights near 70°F. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

Sea temperature near Marrero in May

The nearest coast averages about 78°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 mi away) is warmest in August at about 86°F and coldest in January near 58°F.

It's comfortable for a long swim from Apr 5 to Nov 13 — about 7.3 months when the water holds above 68°F.

50°60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan58Bracing
Feb58Bracing
Mar64Cool
Apr71Refreshing
May78Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep83Tropical
Oct76Warm
Nov67Cool
Dec61Cool

UV index in Marrero in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Marrero peaks around July 11 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 highExtremeVery highHighModerateJul 11UV 10Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Very high
May10Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Marrero in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Marrero 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 Marrero?

Marrero sits at 29.9°N, 90.1°W, 3 ft above sea level, in United States. The nearest listed city is Harvey, 1.2 mi away.

Topography around Marrero

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

Within 2 miles, the terrain around Marrero has only modest variations in elevation — a maximum elevation change of 62 ft around an average of 7 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 164 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 230 ft.

The land around Marrero is covered by artificial surfaces (57%) and grassland (21%) within 2 miles, artificial surfaces (29%) and trees (25%) within 10 miles, and water (40%), trees (29%) and wetland (20%) within 50 miles.

2 miles
62 ft
10 miles
164 ft
50 miles
230 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Harvey 1.2 mi · Gretna 3.1 mi · Estelle 3.7 mi · New Orleans 4.3 mi · Terrytown 4.3 mi · Metairie 6.8 mi · Metairie Terrace 6.8 mi · Chalmette 8.7 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 Marrero (29.8994°, -90.1004°, 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).