Hurricanes and Tornadoes That Hit Monroe Township, NJ

The nearest NOAA station with 1991–2020 climate normals is Hightstown 2 W, NJ, 8 miles southwest of Monroe Township at 100 feet. July is the warmest, with an average high of 87°F and low of 63°F; January is the coolest, at 41°F and 21°F. July is the wettest at 4.8 inches of precipitation on average and February the driest at 2.6 inches; the year adds up to 47.6 inches over 80 days with at least a tenth of an inch. June to November, the hurricane season months, bring 53% of the year's precipitation (25.2 of 47.6 inches); the other six months are drier. September has brought the most of the 46 tropical systems that passed within 75 miles (20); a normal September there has highs of 78°F and 4.2 inches of precipitation. Highs reach 90°F on about 26 days a year, almost all from May to September. Lows fall below freezing on about 114 nights a year. Snowfall averages 23.7 inches a year, most of it in February. That 47.6 inches is more than at 21 of the 51 New Jersey stations used on this site (41%). Helmetta, 3 miles north, has its own station (New Brunswick 3 SE, NJ): 49.5 inches a year, 1.9 more than here, and the same July average high, 87°F.

Water temperature at the NOAA tide station Newbold, PA, 22 miles southwest, 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 Sandy Hook tide gauge, 24 miles from Monroe Township, has risen 1.68 ± 0.04 inches per decade from 1932 to 2025, NOAA's linear trend; at that pace it is 16.8 inches in a hundred years. That is faster than at 105 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 285 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Monroe Township: 184 thunderstorm wind reports, 52 flash floods, 21 heavy rain events, 16 lightning strikes and 12 floods. They killed 1 person and injured 38, and the NWS estimated $30.4 million in property and crop damage. The strongest thunderstorm gust on record here was 90 mph, on August 7, 2000. August has had the most flash floods, 24 of 52. Of the 455 New Jersey cities on this site with a flash flood on record, 187 have had fewer than Monroe Township.

Flood insurance policyholders in Monroe Township's ZIP code 08831 have filed 163 claims with the National Flood Insurance Program since 1978, and were paid $6.1 million for buildings and contents, in the dollars of each year. The most came from Hurricane Irene in 2011: 71 claims (44% of all) and $3.2 million, then Tropical Storm Henri in 2021 with 36. 77% 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, 251 have fewer than Monroe Township.