Hurricanes and Tornadoes That Hit Delran, NJ

The nearest NOAA station with 1991–2020 climate normals is Philadelphia NE Airport, PA, 5 miles northwest of Delran at 100 feet. July is the warmest, with an average high of 88°F and low of 69°F; January is the coolest, at 42°F and 27°F. September is the wettest at 4.5 inches of precipitation on average and February the driest at 2.6 inches; the year adds up to 45.0 inches over 75 days with at least a tenth of an inch. June to November, the hurricane season months, bring 53% of the year's precipitation (23.7 of 45.0 inches); the other six months are drier. September has brought the most of the 41 tropical systems that passed within 75 miles (15); a normal September there has highs of 79°F and 4.5 inches of precipitation. Highs reach 90°F on about 29 days a year, almost all from May to September. Lows fall below freezing on about 88 nights a year. That 45.0 inches is more than at 9 of the 51 New Jersey stations used on this site (18%). Cinnaminson, 3 miles southwest, has its own station (Pennsauken 1N, NJ): 48.2 inches a year, 3.2 more than here, and a July average high of 87°F against 88°F.

Water temperature at the NOAA tide station Burlington, Delaware River, NJ, 6 miles northeast, averaged 80°F in July and 37°F in January over 2021–2025. It averaged 80°F or warmer from July. Sea level at the Philadelphia tide gauge, 12 miles from Delran, 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 1,007 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Delran: 692 thunderstorm wind reports, 181 flash floods, 96 floods, 21 lightning strikes and 17 heavy rain events. They killed 6 people and injured 15, and the NWS estimated $101.1 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on July 22, 2019. July has had the most flash floods, 69 of 181. Of the 455 New Jersey cities on this site with a flash flood on record, 322 have had fewer than Delran.

Flood insurance policyholders in Delran's ZIP code 08075 have filed 191 claims with the National Flood Insurance Program since 1978, and were paid $1.6 million for buildings and contents, in the dollars of each year. The most came from Hurricane Irene in 2011: 28 claims (15% of all) and $101,000, then Hurricane Sandy in 2012 with 18 and April 2007 Nor'easter in 2007 with 15. 47% 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, 259 have fewer than Delran.