Weather & Climate in Gretna, LA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Gretna enjoys a temperate climate with an average annual temperature of 70°F (21°C). Winters average 54°F in January while summers reach 84°F in July. The area gets 317 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 65.9 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 42. The city sits at an elevation of -1 feet.

Temperature

54°F Jan (12°C) 84°F Jul (29°C)

Annual Average	70.2°F
	30% above US avg
January Average	54°F (12°C)
July Average	84°F (29°C)
Sunny Days	317 days/yr

Geography

Elevation	-1 ft (0 m)
Area	4.5 sq mi (11.6 km²)
Population Density	4,324/sq mi
Coordinates	29.9109°N, 90.0517°W
Timezone	America/Chicago
County	St. Charles Parish County
Nearest Airport	Louis Armstrong New Orleans International (MSY) 14 miles away

Precipitation & Snow

Annual Rainfall 65.9"

74% above US avg

Snowfall 0.0"

Wettest Month (Jul) 6.65"

Driest Month (Oct) 3.15"

Air Quality

AQI Median	42.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	85.1 / 100
Social Vulnerability	41.7 / 100
Community Resilience	100.0 / 100

Hazard Breakdown

Tornado	Relatively Moderate
Hurricane	Relatively High
Earthquake	Very Low
Wildfire	Very Low
Flood	Relatively Low
Hail	Relatively Low
Strong Wind	Relatively Low
Heat Wave	Relatively Low
Winter Weather	Relatively Low
Lightning	Relatively Moderate
Ice Storm	Very Low
Drought	Relatively Low
Cold Wave	Relatively Low
Landslide	Very Low
Coastal Flood	Very High

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.0.

Aug 2, 2010	16 km ESE of Clinton, Louisiana	M3.0	127 km	0 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Hurricane History

25 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.

Year	Name	Category	Max Wind	Closest
2024	Francine	Category 2	104 mph	89 km
2021	Ida	Category 4	150 mph	53 km
2020	Zeta	Category 3	115 mph	35 km
2020	Delta	Category 2	98 mph	275 km
2020	Sally	Category 2	109 mph	194 km
2019	Barry	Category 1	75 mph	191 km
2017	Nate	Category 1	92 mph	82 km
2012	Isaac	Category 1	81 mph	71 km
2009	Ida	Category 1	86 mph	205 km
2008	Gustav	Category 2	109 mph	101 km
2005	Katrina	Category 4	144 mph	54 km
2005	Dennis	Category 3	121 mph	282 km
2005	Cindy	Category 1	75 mph	79 km
2004	Ivan	Category 4	132 mph	206 km
2002	Lili	Category 4	121 mph	213 km
1998	Georges	Category 2	109 mph	123 km
1998	Earl	Category 2	98 mph	216 km
1997	Danny	Category 1	81 mph	76 km
1995	Opal	Category 4	150 mph	249 km
1995	Erin	Category 1	86 mph	257 km

Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

508 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 38 fatalities, 745 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 6, 1983	EF4	48 km	7.0 mi	0
Oct 3, 1964	EF4	46 km	1.5 mi	22
Mar 22, 2022	EF3	3 km	11.5 mi	1
Feb 7, 2017	EF3	12 km	10.1 mi	0
Feb 23, 2016	EF3	99 km	7.8 mi	0
Dec 25, 2012	EF3	90 km	60.3 mi	0
May 26, 2011	EF3	78 km	6.1 mi	0
Aug 25, 1992	EF3	42 km	9.0 mi	2
May 19, 1980	EF3	68 km	13.1 mi	0
May 19, 1980	EF3	99 km	10.6 mi	0
Apr 12, 1969	EF3	88 km	10.7 mi	0
Jan 28, 1966	EF3	26 km	0.1 mi	0
Mar 21, 1957	EF3	70 km	2.0 mi	0
Feb 6, 1953	EF3	89 km	15.6 mi	2
Apr 10, 2024	EF2	44 km	11.0 mi	0
Dec 14, 2022	EF2	44 km	4.7 mi	1
Dec 14, 2022	EF2	8 km	10.6 mi	0
Jun 6, 2019	EF2	77 km	1.6 mi	0
Nov 1, 2018	EF2	95 km	2.3 mi	0
Feb 7, 2017	EF2	68 km	23.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: KILN (BAYOU BACON) (3,576 acres, 2006).

Year	Name	Acres Burned	Distance
2006	KILN (BAYOU BACON)	3,576	78 km
2000	UNIT 1 B	2,030	26 km
2006	UNNAMED	1,984	100 km
1998	UNIT 4 CD	1,729	45 km
2015	BAYOU LACROIX	1,714	73 km
2009	SLIDELL AIRPORT	1,663	55 km
1998	UNIT 7	1,623	41 km
2008	UNNAMED	1,594	65 km
2006	UNNAMED	1,482	90 km
2011	BAD ROMANCE	1,305	22 km
2011	TONEY ISLAND	1,215	72 km
2006	UNNAMED	1,206	74 km
2006	UNNAMED	1,111	91 km
2004	UNITS 1A-1B	1,108	27 km
2006	UNNAMED	1,102	75 km
2006	UNNAMED	1,049	92 km
2001	UNNAMED	950	50 km
2010	UNNAMED	904	31 km
2006	UNNAMED	866	72 km
2009	GOOSEPOINT C	864	43 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	54°F (12°C)	5.4 in	Coldest
February	56°F (13°C)	5.5 in
March	62°F (17°C)	5.3 in
April	68°F (20°C)	4.6 in
May	76°F (24°C)	5.0 in
June	81°F (27°C)	5.6 in
July	84°F (29°C)	6.7 in	Warmest, Wettest
August	83°F (28°C)	6.3 in
September	79°F (26°C)	5.6 in
October	71°F (21°C)	3.2 in	Driest
November	62°F (17°C)	4.7 in
December	56°F (13°C)	5.1 in

Gretna has a seasonal temperature swing of 30°F / from 54°F in January to 84°F in July. Total annual precipitation is 62.9 inches, with July being the wettest month (6.7") and October the driest (3.2").

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