Hurricanes and Tornadoes That Hit Pequannock, NJ

The nearest NOAA station with 1991–2020 climate normals is Caldwell Essex Co Airport, NJ, 5 miles south of Pequannock at 173 feet. July is the warmest, with an average high of 85°F and low of 66°F; January is the coolest, at 38°F and 23°F. August is the wettest at 4.5 inches of precipitation on average and February the driest at 2.6 inches; the year adds up to 44.9 inches over 77 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (24.1 of 44.9 inches); the other six months are drier. September has brought the most of the 41 tropical systems that passed within 75 miles (17); a normal September there has highs of 76°F and 3.7 inches of precipitation. Highs reach 90°F on about 21 days a year, almost all from May to September. Lows fall below freezing on about 108 nights a year. That 44.9 inches is more than at 8 of the 51 New Jersey stations used on this site (16%). Pompton Plains, 1 mile north, has its own station (Wanaque Raymond Dam, NJ): 48.5 inches a year, 3.6 more than here, and a July average high of 84°F against 85°F.

Water temperature at the NOAA tide station The Battery, NY, 23 miles southeast, averaged 74°F in August and 39°F in February over 2021–2025. No month averaged 80°F. Sea level at the The Battery tide gauge, 23 miles from Pequannock, has risen 1.16 ± 0.02 inches per decade from 1856 to 2025, NOAA's linear trend; at that pace it is 11.6 inches in a hundred years. That is faster than at 66 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 512 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Pequannock: 246 thunderstorm wind reports, 162 flash floods, 71 floods, 22 lightning strikes and 11 heavy rain events. They killed 4 people and injured 13, and the NWS estimated $32.1 million in property and crop damage. The strongest thunderstorm gust on record here was 110 mph, on October 7, 2013. July has had the most flash floods, 56 of 162. Of the 455 New Jersey cities on this site with a flash flood on record, 305 have had fewer than Pequannock.

Flood insurance policyholders in Pequannock's ZIP code 07440 have filed 1,430 claims with the National Flood Insurance Program since 1978, and were paid $34.9 million for buildings and contents, in the dollars of each year. The most came from Hurricane Irene in 2011: 365 claims (26% of all) and $20.1 million, then March 2010 Nor'easter in 2010 with 220 and Flooding in 1984 with 194. 88% 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, 358 have fewer than Pequannock.