Weather & Climate in Harahan, LA

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

Harahan has a warm climate with an average annual temperature of 72°F (22°C). Winters average 55°F in January while summers reach 85°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 64.6 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 9 feet.

Temperature

55°F Jan (13°C) 85°F Jul (30°C)

Annual Average	71.8°F
	33% above US avg
January Average	55°F (13°C)
July Average	85°F (30°C)
Sunny Days	317 days/yr

Geography

Elevation	9 ft (3 m)
Area	2.0 sq mi (5.2 km²)
Population Density	4,425/sq mi
Coordinates	29.9364°N, 90.2027°W
Timezone	America/Chicago
County	St. Charles Parish County
Nearest Airport	Louis Armstrong New Orleans International (MSY) 5 miles away

Precipitation & Snow

Annual Rainfall 64.6"

70% above US avg

Wettest Month (Jul) 6.73"

Driest Month (Oct) 3.19"

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	116 km	0 km

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

Hurricane History

26 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	77 km
2021	Ida	Category 4	150 mph	39 km
2020	Laura	Category 4	150 mph	299 km
2020	Zeta	Category 3	115 mph	41 km
2020	Delta	Category 2	98 mph	260 km
2020	Sally	Category 2	109 mph	209 km
2019	Barry	Category 1	75 mph	179 km
2017	Nate	Category 1	92 mph	97 km
2012	Isaac	Category 1	81 mph	66 km
2009	Ida	Category 1	86 mph	216 km
2008	Gustav	Category 2	109 mph	95 km
2005	Katrina	Category 4	144 mph	65 km
2005	Dennis	Category 3	121 mph	295 km
2005	Cindy	Category 1	75 mph	83 km
2004	Ivan	Category 4	132 mph	221 km
2002	Lili	Category 4	121 mph	199 km
1998	Georges	Category 2	109 mph	135 km
1998	Earl	Category 2	98 mph	226 km
1997	Danny	Category 1	81 mph	86 km
1995	Opal	Category 4	150 mph	264 km

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

Tornado History

529 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 39 fatalities, 764 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 6, 1983	EF4	34 km	7.0 mi	0
Oct 3, 1964	EF4	41 km	1.5 mi	22
Mar 22, 2022	EF3	16 km	11.5 mi	1
Feb 7, 2017	EF3	21 km	10.1 mi	0
Feb 23, 2016	EF3	85 km	7.8 mi	0
Dec 25, 2012	EF3	94 km	60.3 mi	0
May 26, 2011	EF3	77 km	6.1 mi	0
Aug 25, 1992	EF3	28 km	9.0 mi	2
May 19, 1980	EF3	79 km	13.1 mi	0
Sep 16, 1971	EF3	98 km	7.3 mi	0
Apr 12, 1969	EF3	73 km	10.7 mi	0
Jan 28, 1966	EF3	12 km	0.1 mi	0
Mar 21, 1957	EF3	62 km	2.0 mi	0
Feb 6, 1953	EF3	77 km	15.6 mi	2
Apr 10, 2024	EF2	51 km	11.0 mi	0
Dec 14, 2022	EF2	10 km	10.6 mi	0
Dec 14, 2022	EF2	29 km	4.7 mi	1
Jun 6, 2019	EF2	62 km	1.6 mi	0
Nov 1, 2018	EF2	95 km	2.3 mi	0
Feb 7, 2017	EF2	56 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	86 km
2000	UNIT 1 B	2,030	35 km
1998	UNIT 4 CD	1,729	47 km
2015	BAYOU LACROIX	1,714	83 km
2009	SLIDELL AIRPORT	1,663	59 km
1998	UNIT 7	1,623	44 km
2008	UNNAMED	1,594	68 km
2006	UNNAMED	1,482	99 km
2011	BAD ROMANCE	1,305	32 km
2011	TONEY ISLAND	1,215	82 km
2006	UNNAMED	1,206	68 km
2006	UNNAMED	1,111	99 km
2004	UNITS 1A-1B	1,108	35 km
2006	UNNAMED	1,102	76 km
2001	UNNAMED	950	51 km
2010	UNNAMED	904	17 km
2006	UNNAMED	866	80 km
2009	GOOSEPOINT C	864	46 km
1996	1 B	846	33 km
2006	BOY SCOUT EAST	826	46 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	55°F (13°C)	5.4 in
February	55°F (13°C)	5.4 in	Coldest
March	62°F (17°C)	5.2 in
April	68°F (20°C)	4.7 in
May	75°F (24°C)	5.1 in
June	80°F (27°C)	5.7 in
July	85°F (30°C)	6.7 in	Warmest, Wettest
August	82°F (28°C)	6.5 in
September	79°F (26°C)	5.8 in
October	70°F (21°C)	3.2 in	Driest
November	61°F (16°C)	4.7 in
December	55°F (13°C)	5.0 in

Harahan has a seasonal temperature swing of 30°F / from 55°F in February to 85°F in July. Total annual precipitation is 63.4 inches, with July being the wettest month (6.7") and October the driest (3.2").

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