Hurricanes and Tornadoes That Hit Havre De Grace, MD

The nearest NOAA station with 1991–2020 climate normals is Aberdeen Phillips Field, MD, 7 miles southwest of Havre De Grace at 57 feet. July is the warmest, with an average high of 86°F and low of 68°F; January is the coolest, at 42°F and 25°F. July and September are the wettest at 4.8 inches of precipitation on average and February the driest at 2.8 inches; the year adds up to 47.2 inches. June to November, the hurricane season months, bring 54% of the year's precipitation (25.6 of 47.2 inches); the other six months are drier. September has brought the most of the 34 tropical systems that passed within 75 miles (12); a normal September there has highs of 78°F and 4.8 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 83 nights a year. That 47.2 inches is more than at 26 of the 41 Maryland stations used on this site (63%). Perryville, 3 miles east, has its own station (Conowingo Dam, MD): 48.2 inches a year, 1.0 more than here, and a July average high of 88°F against 86°F.

Water temperature at the NOAA tide station Chesapeake City, MD, 16 miles east, averaged 84°F in July and 38°F in January over 2021–2025. It averaged 80°F or warmer from July to August. Sea level at the Chesapeake City tide gauge, 16 miles from Havre De Grace, has risen 1.76 ± 0.12 inches per decade from 1972 to 2025, NOAA's linear trend; at that pace it is 17.6 inches in a hundred years. That is faster than at 111 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 372 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Havre De Grace: 276 thunderstorm wind reports, 45 flash floods, 40 floods, 6 lightning strikes and 5 heavy rain events. They killed 4 people and injured 5, and the NWS estimated $3.2 million in property and crop damage. The strongest thunderstorm gust on record here was 85 mph, on May 11, 2013. August has had the most flash floods, 16 of 45. Of the 239 Maryland cities on this site with a flash flood on record, 139 have had fewer than Havre De Grace.

Flood insurance policyholders in Havre De Grace's ZIP code 21078 have filed 81 claims with the National Flood Insurance Program since 1978, and were paid $1.2 million for buildings and contents, in the dollars of each year. The most came from Hurricane Isabel in 2003: 43 claims (53% of all) and $525,000. 60% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 150 Maryland cities on this site with 10 or more claims, 104 have fewer than Havre De Grace.