Hurricanes and Tornadoes That Hit Newtown, PA

The nearest NOAA station with 1991–2020 climate normals is Trenton Mercer Co Airport, NJ, 7 miles east of Newtown at 184 feet. July is the warmest, with an average high of 86°F and low of 67°F; January is the coolest, at 40°F and 24°F. June and July are the wettest at 4.4 inches of precipitation on average and February the driest at 2.7 inches; the year adds up to 45.7 inches over 77 days with at least a tenth of an inch. June to November, the hurricane season months, bring 53% of the year's precipitation (24.1 of 45.7 inches); the other six months are drier. September has brought the most of the 40 tropical systems that passed within 75 miles (15); a normal September there has highs of 77°F and 4.1 inches of precipitation. Highs reach 90°F on about 22 days a year, almost all from May to September. Lows fall below freezing on about 97 nights a year. Snowfall averages 26.6 inches a year, most of it in February. That 45.7 inches is more than at 86 of the 148 Pennsylvania stations used on this site (58%). Richboro, 4 miles southwest, has its own station (Neshaminy Falls, PA): 50.8 inches a year, 5.1 more than here, and the same July average high, 86°F.

Water temperature at the NOAA tide station Burlington, Delaware River, NJ, 12 miles south, 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, 24 miles from Newtown, 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 428 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Newtown: 289 thunderstorm wind reports, 70 flash floods, 36 floods, 21 lightning strikes and 12 heavy rain events. They killed 13 people and injured 31, and the NWS estimated $108.0 million in property and crop damage. The strongest thunderstorm gust on record here was 109 mph, on October 31, 2019. July has had the most flash floods, 26 of 70. Of the 788 Pennsylvania cities on this site with a flash flood on record, 591 have had fewer than Newtown.

Flood insurance policyholders in Newtown's ZIP code 18940 have filed 47 claims with the National Flood Insurance Program since 1979, and were paid $855,000 for buildings and contents, in the dollars of each year. The year with the most claims was 2011, with 10. 53% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 553 Pennsylvania cities on this site with 10 or more claims, 266 have fewer than Newtown.