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Marrero, Louisiana climate

Cfa Humid subtropical

Marrero has a seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 94°F, while the coldest is January averaging around 47°F at night. Around 65 inches of precipitation falls each year, peaking in July (8.8 inches) and easing off in October (3.6 inches).

☀️ Summers

Hot

Highs near 94°F in August.

About 97 days a year above 90 °F

❄️ Winters

Cool

Lows near 47°F in January.

About 3 freezing nights a year

🌧️ Rain

Very wet

About 65 in of rain a year.

Wettest in July

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+1.7 °F vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Marrero climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	64	68	75	81	88	93	94	94	90	83	73	66
Avg temp (°F)	55	59	65	71	79	84	85	86	82	74	64	58
Avg low (°F)	47	51	56	62	69	75	77	77	74	65	55	49
Precipitation (in)	5.0	4.1	4.6	5.0	5.4	7.4	8.8	6.8	5.7	3.6	3.8	4.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	64	68	75	81	88	93
Avg temp (°F)	55	59	65	71	79	84
Avg low (°F)	47	51	56	62	69	75
Precipitation (in)	5.0	4.1	4.6	5.0	5.4	7.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	94	94	90	83	73	66
Avg temp (°F)	85	86	82	74	64	58
Avg low (°F)	77	77	74	65	55	49
Precipitation (in)	8.8	6.8	5.7	3.6	3.8	4.5

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	9	7	7	7	12	14	13	9	6	7	8
Days with high ≥ 90°F (days)	—	—	—	0.5	9	21	25	25	15	2	—	—
Days with low ≤ 32°F (days)	2	0.5	0.1	—	—	—	—	—	—	—	0.1	0.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	9	7	7	7	12
Days with high ≥ 90°F (days)	—	—	—	0.5	9	21
Days with low ≤ 32°F (days)	2	0.5	0.1	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	14	13	9	6	7	8
Days with high ≥ 90°F (days)	25	25	15	2	—	—
Days with low ≤ 32°F (days)	—	—	—	—	0.1	0.6

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	59	59	55	53	48	53	58	56	48	41	46	59
Clear days (≤ 30% cloud)	7	7	9	9	10	7	5	5	10	15	12	7
Partly cloudy days (30–70%)	10	9	10	11	13	14	15	15	11	8	10	11
Cloudy days (≥ 70%)	14	13	12	10	8	9	11	10	8	8	8	13
Relative humidity (%)	82	82	81	79	77	77	77	77	78	78	79	82
Wind speed (mph)	8.3	8.2	8.2	8.4	7.3	6.4	5.9	5.8	6.9	7.5	7.8	8.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	59	59	55	53	48	53
Clear days (≤ 30% cloud)	7	7	9	9	10	7
Partly cloudy days (30–70%)	10	9	10	11	13	14
Cloudy days (≥ 70%)	14	13	12	10	8	9
Relative humidity (%)	82	82	81	79	77	77
Wind speed (mph)	8.3	8.2	8.2	8.4	7.3	6.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	58	56	48	41	46	59
Clear days (≤ 30% cloud)	5	5	10	15	12	7
Partly cloudy days (30–70%)	15	15	11	8	10	11
Cloudy days (≥ 70%)	11	10	8	8	8	13
Relative humidity (%)	77	77	78	78	79	82
Wind speed (mph)	5.9	5.8	6.9	7.5	7.8	8.0

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at New Orleans Audubon (NOAA GHCN station USW00012930), about 3 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →