Hurricanes and Tornadoes That Hit Kennett Square, PA

The nearest NOAA station with 1991–2020 climate normals is Avondale 2 N, PA, 4 miles west of Kennett Square at 400 feet. July is the warmest, with an average high of 84°F and low of 64°F; January is the coolest, at 39°F and 23°F. September is the wettest at 4.5 inches of precipitation on average and February the driest at 3.1 inches; the year adds up to 47.1 inches over 80 days with at least a tenth of an inch. June to November, the hurricane season months, bring 52% of the year's precipitation (24.6 of 47.1 inches); the other six months are drier. September has brought the most of the 34 tropical systems that passed within 75 miles (13); a normal September there has highs of 75°F and 4.5 inches of precipitation. Highs reach 90°F on about 8 days a year, almost all from June to August. Lows fall below freezing on about 109 nights a year. That 47.1 inches is more than at 103 of the 148 Pennsylvania stations used on this site (70%). Chadds Ford, 6 miles east, has its own station (Wilmington Porter Rsch, DE): 50.5 inches a year, 3.4 more than here, and the same July average high, 84°F.

Water temperature at the NOAA tide station Marcus Hook, PA, 16 miles east, averaged 82°F in July and 39°F in January over 2021–2025. It averaged 80°F or warmer from July to August. Sea level at the Reedy Point tide gauge, 22 miles from Kennett Square, has risen 1.55 ± 0.09 inches per decade from 1956 to 2025, NOAA's linear trend; at that pace it is 15.5 inches in a hundred years. That is faster than at 93 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 477 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Kennett Square: 314 thunderstorm wind reports, 91 flash floods, 42 floods, 16 lightning strikes and 14 heavy rain events. They killed 1 person and injured 11, and the NWS estimated $11.1 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on August 7, 2023. Of the 788 Pennsylvania cities on this site with a flash flood on record, 662 have had fewer than Kennett Square.

Flood insurance policyholders in Kennett Square's ZIP code 19348 have filed 64 claims with the National Flood Insurance Program since 1978, and were paid $916,000 for buildings and contents, in the dollars of each year. The year with the most claims was 2020, with 14. 27% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 553 Pennsylvania cities on this site with 10 or more claims, 306 have fewer than Kennett Square.