Hurricanes and Tornadoes That Hit Duncansville, PA

The nearest NOAA station with 1991–2020 climate normals is Altoona 7 SW, PA, 2 miles east of Duncansville at 1,180 feet. July is the warmest, with an average high of 83°F and low of 62°F; January is the coolest, at 36°F and 20°F. September is the wettest at 4.4 inches of precipitation on average and February the driest at 2.4 inches; the year adds up to 41.8 inches over 86 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (22.5 of 41.8 inches); the other six months are drier. Highs reach 90°F on about 10 days a year, almost all from June to September. Lows fall below freezing on about 127 nights a year. Snowfall averages 38.0 inches a year, most of it in January and February. That 41.8 inches is more than at 31 of the 148 Pennsylvania stations used on this site (21%). Roaring Spring, 7 miles southeast, has its own station (Altoona Blair Co Airport, PA): 36.8 inches a year, 5.0 less than here, and the same July average high, 83°F.

Since 1996, the National Weather Service has logged 168 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Duncansville: 145 thunderstorm wind reports, 14 flash floods and 9 floods. None is recorded as killing or injuring anyone; the NWS estimated $578,000 in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on March 16, 2025. June has had the most flash floods, 6 of 14. Of the 788 Pennsylvania cities on this site with a flash flood on record, 247 have had fewer than Duncansville.

Flood insurance policyholders in Duncansville's ZIP code 16635 have filed 131 claims with the National Flood Insurance Program since 1978, and were paid $1.4 million for buildings and contents, in the dollars of each year. The most came from Flooding in 1996: 24 claims (18% of all) and $99,000, then Tropical Storm Ivan in 2004 with 12. The year with the most claims was 2004, with 29. 33% 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, 414 have fewer than Duncansville.