Hurricanes and Tornadoes That Hit Swedesboro, NJ

The nearest NOAA station with 1991–2020 climate normals is Marcus Hook, PA, 7 miles northwest of Swedesboro at 10 feet. July is the warmest, with an average high of 89°F and low of 70°F; January is the coolest, at 43°F and 27°F. July is the wettest at 4.8 inches of precipitation on average and February the driest at 2.2 inches; the year adds up to 41.8 inches over 66 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (22.5 of 41.8 inches); the other six months are drier. September has brought the most of the 40 tropical systems that passed within 75 miles (16); a normal September there has highs of 80°F and 4.4 inches of precipitation. Highs reach 90°F on about 27 days a year, almost all from May to September. Lows fall below freezing on about 64 nights a year. That 41.8 inches is more than at 2 of the 51 New Jersey stations used on this site (4%). Mickleton, 5 miles northeast, has its own station (Philadelphia International Airport, PA): 44.2 inches a year, 2.4 more than here, and a July average high of 88°F against 89°F.

Water temperature at the NOAA tide station Marcus Hook, PA, 6 miles northwest, 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 Philadelphia tide gauge, 16 miles from Swedesboro, has risen 1.24 ± 0.04 inches per decade from 1900 to 2025, NOAA's linear trend; at that pace it is 12.4 inches in a hundred years. That is faster than at 73 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 402 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Swedesboro: 251 thunderstorm wind reports, 90 flash floods, 42 floods, 10 lightning strikes and 9 heavy rain events. They killed 4 people and injured 13, and the NWS estimated $27.5 million in property and crop damage. The strongest thunderstorm gust on record here was 85 mph, on June 23, 2015. August has had the most flash floods, 29 of 90. Of the 455 New Jersey cities on this site with a flash flood on record, 241 have had fewer than Swedesboro.

Flood insurance policyholders in Swedesboro's ZIP code 08085 have filed 16 claims with the National Flood Insurance Program since 1999, and were paid $193,000 for buildings and contents, in the dollars of each year. 50% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 395 New Jersey cities on this site with 10 or more claims, 36 have fewer than Swedesboro.