Hurricanes and Tornadoes That Hit Mechanicsburg, PA

The nearest NOAA station with 1991–2020 climate normals is Harrisburg 1 NE, PA, 8 miles northeast of Mechanicsburg at 420 feet. July is the warmest, with an average high of 85°F and low of 65°F; January is the coolest, at 37°F and 22°F. July is the wettest at 4.8 inches of precipitation on average and February the driest at 2.8 inches; the year adds up to 45.3 inches over 82 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (24.4 of 45.3 inches); the other six months are drier. October has brought the most of the 23 tropical systems that passed within 75 miles (8); a normal October there has highs of 63°F and 3.8 inches of precipitation. Highs reach 90°F on about 18 days a year, almost all from June to August. Lows fall below freezing on about 111 nights a year. Snowfall averages 23.9 inches a year, most of it in February. That 45.3 inches is more than at 81 of the 148 Pennsylvania stations used on this site (55%). Camp Hill, 4 miles east, has its own station (Harrisburg Cptl Cy Airport, PA): 41.1 inches a year, 4.2 less than here, and a July average high of 88°F against 85°F.

Since 1996, the National Weather Service has logged 273 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Mechanicsburg: 242 thunderstorm wind reports, 21 flash floods, 9 floods and 1 lightning strike. They killed 1 person and injured 6, and the NWS estimated $1.3 million in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on June 14, 2026. Of the 788 Pennsylvania cities on this site with a flash flood on record, 347 have had fewer than Mechanicsburg.

Flood insurance policyholders in Mechanicsburg's 2 ZIP codes have filed 449 claims with the National Flood Insurance Program since 1978, and were paid $2.1 million for buildings and contents, in the dollars of each year. The most came from Flooding in 1984: 121 claims (27% of all) and $349,000, then Not a named storm in 1979 with 67 and Tropical Storm Ivan in 2004 with 30. 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, 521 have fewer than Mechanicsburg.