Hurricanes and Tornadoes That Hit Greenlawn, NY

The nearest NOAA station with 1991–2020 climate normals is Centerport, NY, 2 miles north of Greenlawn at 30 feet. July is the warmest, with an average high of 83°F and low of 66°F; January is the coolest, at 38°F and 25°F. September is the wettest at 4.7 inches of precipitation on average and February the driest at 3.1 inches; the year adds up to 48.5 inches. June to November, the hurricane season months, bring 51% of the year's precipitation (24.9 of 48.5 inches); the other six months are drier. September has brought the most of the 52 tropical systems that passed within 75 miles (22); a normal September there has highs of 74°F and 4.7 inches of precipitation. Highs reach 90°F on about 11 days a year, almost all from June to August. Lows fall below freezing on about 88 nights a year. That 48.5 inches is more than at 111 of the 137 New York stations used on this site (81%). Melville, 5 miles southwest, has its own station (Farmingdale Airport, NY): 38.5 inches a year, 10.0 less than here, and the same July average high, 83°F.

Water temperature at the NOAA tide station Kings Point, NY, 21 miles west, averaged 74°F in August and 38°F in February over 2021–2025. No month averaged 80°F. Sea level at the Kings Point tide gauge, 21 miles from Greenlawn, has risen 1.08 ± 0.04 inches per decade from 1931 to 2025, NOAA's linear trend; at that pace it is 10.8 inches in a hundred years. That is faster than at 62 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 192 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Greenlawn: 106 thunderstorm wind reports, 81 flash floods, 3 lightning strikes, 1 flood and 1 heavy rain event. They killed 2 people and injured 3, and the NWS estimated $39.0 million in property and crop damage. The strongest thunderstorm gust on record here was 78 mph, on September 1, 2021. August has had the most flash floods, 41 of 81. Of the 798 New York cities on this site with a flash flood on record, 614 have had fewer than Greenlawn.

Flood insurance policyholders in Greenlawn's ZIP code 11740 have filed 12 claims with the National Flood Insurance Program since 1979, and were paid $35,000 for buildings and contents, in the dollars of each year. 17% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 549 New York cities on this site with 10 or more claims, 31 have fewer than Greenlawn.