Hurricanes and Tornadoes That Hit Mountainside, NJ

The nearest NOAA station with 1991–2020 climate normals is Cranford, NJ, 2 miles southeast of Mountainside at 80 feet. July is the warmest, with an average high of 86°F and low of 68°F; January is the coolest, at 40°F and 25°F. July is the wettest at 5.3 inches of precipitation on average and February the driest at 3.3 inches; the year adds up to 50.4 inches over 81 days with at least a tenth of an inch. June to November, the hurricane season months, bring 52% of the year's precipitation (26.2 of 50.4 inches); the other six months are drier. September has brought the most of the 42 tropical systems that passed within 75 miles (18); a normal September there has highs of 77°F and 4.3 inches of precipitation. Highs reach 90°F on about 28 days a year, almost all from May to September. Lows fall below freezing on about 111 nights a year. Snowfall averages 26.3 inches a year, most of it in February. That 50.4 inches is more than at 35 of the 51 New Jersey stations used on this site (69%). Summit, 2 miles north, has its own station (Canoe Brook, NJ): 50.4 inches a year, the same as here, and the same July average high, 86°F.

Water temperature at the NOAA tide station The Battery, NY, 18 miles east, averaged 74°F in August and 39°F in February over 2021–2025. No month averaged 80°F. Sea level at the Bergen Point tide gauge, 11 miles from Mountainside, has risen 1.86 ± 0.13 inches per decade from 1981 to 2024, NOAA's linear trend; at that pace it is 18.6 inches in a hundred years. That is faster than at 114 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 674 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Mountainside: 382 thunderstorm wind reports, 201 flash floods, 59 floods, 27 lightning strikes and 5 heavy rain events. They killed 17 people and injured 19, and the NWS estimated $55.4 million in property and crop damage. The strongest thunderstorm gust on record here was 92 mph, on June 10, 2008. July has had the most flash floods, 74 of 201. Of the 455 New Jersey cities on this site with a flash flood on record, 336 have had fewer than Mountainside.

Flood insurance policyholders in Mountainside's ZIP code 07092 have filed 28 claims with the National Flood Insurance Program since 1979, and were paid $320,000 for buildings and contents, in the dollars of each year. 64% 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, 81 have fewer than Mountainside.