Hurricanes and Tornadoes That Hit Galliano, LA

The nearest NOAA station with 1991–2020 climate normals is Galliano, LA, 2 miles north of Galliano at 5 feet. August is the warmest, with an average high of 89°F and low of 76°F; January is the coolest, at 63°F and 45°F. July is the wettest at 9.2 inches of precipitation on average and November the driest at 3.5 inches; the year adds up to 66.8 inches over 81 days with at least a tenth of an inch. June to November, the hurricane season months, bring 57% of the year's precipitation (38.1 of 66.8 inches); the other six months are drier. September has brought the most of the 86 tropical systems that passed within 75 miles (33); a normal September there has highs of 86°F and 6.6 inches of precipitation. Highs reach 90°F on about 49 days a year, almost all from May to September. Lows fall below freezing on about 9 nights a year. That 66.8 inches is more than at 76 of the 81 Louisiana stations used on this site (94%). Lafitte, 19 miles northeast, has its own station (New Orleans Alvin Callender Fl, LA): 64.1 inches a year, 2.7 less than here, and an August average high of 90°F against 89°F.

Water temperature at the NOAA tide station Grand Isle, LA, 24 miles southeast, averaged 88°F in August and 59°F in January over 2021–2025. It averaged 80°F or warmer from May to September. Sea level at the Grand Isle tide gauge, 24 miles from Galliano, has risen 3.59 ± 0.07 inches per decade from 1947 to 2025, NOAA's linear trend; at that pace it is 35.9 inches in a hundred years. That is faster than at 141 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 10 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Galliano: 8 thunderstorm wind reports, 1 flash flood and 1 heavy rain event. None is recorded as killing or injuring anyone; the NWS estimated $14,000 in property and crop damage. The strongest thunderstorm gust on record here was 63 mph, on April 4, 2011.

Flood insurance policyholders in Galliano's ZIP code 70354 have filed 543 claims with the National Flood Insurance Program since 1978, and were paid $4.7 million for buildings and contents, in the dollars of each year. The most came from Hurricane Juan in 1985: 296 claims (55% of all) and $3.2 million, then Hurricane Gustav in 2008 with 96 and Hurricane Katrina in 2005 with 49. 95% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 219 Louisiana cities on this site with 10 or more claims, 147 have fewer than Galliano.