Marrero weather in December

In December, Marrero sees average daytime highs of 63°F and overnight lows near 51°F, with 3.8 in of precipitation across 9.2 wet days and about 10.1 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 65°F in the first days to 61°F by the end. The sky is clear or mostly clear about 35% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 12 min at the start of December to 10 h 06 min by month's end. Set against the rest of the year, December is Marrero's 10th-clearest and 5th-windiest month. For the whole year in context, see Marrero's year-round climate.

Daytime high
63°
11th warmest
Overnight low
51°
2nd coldest
Precipitation
3.8 in
9.2 wet days
Daylight
10 h 06 min
6:54 AM – 4:59 PM
Cloud cover
57%
10th clearest
Wind
9 mph
5th windiest
Solar energy
2.73 kWh/m²
Travel score
5.7
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 65°F in the first days to 61°F by the end.

A typical December day in Marrero reaches about 63°F in the afternoon and slips back to 51°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 73°F. Set against its neighbours, December runs about 6°F cooler than November and about 2°F warmer than January.

30°40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16653
26553
36552
46552
56552
66552
76452
86452
96451
106451
116451
126351
136351
146351
156351
166350
176350
186250
196250
206250
216250
226250
236250
246250
256150
266149
276149
286149
296149
306149
316149

How December really feels in Marrero

Once humidity and wind are folded in, December 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

December 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 December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25446
35248
45149
55050
64852
74852
84753
94753
104852
114852
124654
134654
144753
154753
164654
174753
184753
194654
204654
214753
224654
234654
244555
254456
264456
274456
284456
294456
304456
314357

Chance of precipitation in December

Any precipitation

Marrero gets around 3.8 in of rain and snow over 9.2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 30% and peaks near 31% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
429
529
629
729
829
929
1029
1129
1229
1329
1429
1529
1630
1730
1830
1930
2030
2131
2231
2331
2431
2531
2631
2731
2831
2931
3031
3131

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
159151691
260141691
360141691
461131691
561131691
662131681
762131681
862131681
964121581
1064121581
1164121581
1265121481
1366121480
1466121480
1566121480
1667121380
1767121380
1868121370
1968121271
2068121271
2168121271
2268121271
2368131261
2468131261
2568131261
2668131261
2768131261
2868131261
2968131261
3069131251
3169131251

Wind in December

Winds average 9 mph in December.

Across December, daily wind ranges from about 9 mph on the calmest days to 10 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
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 12 min at the start of December to 10 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:44 AM to 7:01 AM, and sunset from 4:57 PM to 5:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.26:444:57
210.26:444:57
310.26:454:57
410.26:464:57
510.26:474:57
610.26:474:57
710.16:484:57
810.16:494:57
910.16:504:57
1010.16:504:58
1110.16:514:58
1210.16:524:58
1310.16:524:58
1410.16:534:59
1510.16:534:59
1610.16:544:59
1710.16:555:00
1810.16:555:00
1910.16:565:00
2010.16:565:01
2110.16:575:01
2210.16:575:02
2310.16:585:02
2410.16:585:03
2510.16:585:03
2610.16:595:04
2710.16:595:04
2810.17:005:05
2910.17:005:05
3010.17:005:06
3110.17:015:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.73 kWh/m² — the year's lowest.

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 — December's 2.73 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
32.9Moderate
42.9Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.8Moderate
92.8Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.7Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.7Moderate
312.7Moderate
Planning a trip in December

Hazard calendar for Marrero

In seasonPeak

None of Marrero's seasonal hazards are active in December. 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 December a good time to visit Marrero?

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

5.7
Sightseeing
7th-best month of the year
1.5
Beach & pool
11th-best month of the year

December is a reasonable time to visit Marrero for sightseeing.

What to pack for Marrero in December

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

In December, Marrero sees daytime highs around 63°F and nights near 51°F. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Marrero in December

The nearest coast averages about 61°F in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. 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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).