Hurricanes and Tornadoes That Hit Glastonbury, CT

The nearest NOAA station with 1991–2020 climate normals is Hartford Brainard Field, CT, 5 miles northwest of Glastonbury at 19 feet. July is the warmest, with an average high of 85°F and low of 66°F; January is the coolest, at 37°F and 20°F. October is the wettest at 4.2 inches of precipitation on average and February the driest at 2.6 inches; the year adds up to 42.9 inches over 76 days with at least a tenth of an inch. June to November, the hurricane season months, bring 53% of the year's precipitation (22.9 of 42.9 inches); the other six months are drier. September has brought the most of the 53 tropical systems that passed within 75 miles (22); a normal September there has highs of 76°F and 4.0 inches of precipitation. Highs reach 90°F on about 17 days a year, almost all from May to September. Lows fall below freezing on about 121 nights a year. That 42.9 inches is more than at 2 of the 27 Connecticut stations used on this site (7%). Bolton, 8 miles northeast, has its own station (Storrs, CT): 49.3 inches a year, 6.4 more than here, and a July average high of 81°F against 85°F.

Since 1996, the National Weather Service has logged 236 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Glastonbury: 160 thunderstorm wind reports, 37 flash floods, 26 floods, 12 lightning strikes and 1 heavy rain event. They killed 0 people and injured 3, and the NWS estimated $3.1 million in property and crop damage. The strongest thunderstorm gust on record here was 110 mph, on July 21, 2010. August has had the most flash floods, 15 of 37. Of the 186 Connecticut cities on this site with a flash flood on record, 113 have had fewer than Glastonbury.

Flood insurance policyholders in Glastonbury's ZIP code 06033 have filed 41 claims with the National Flood Insurance Program since 1978, and were paid $139,000 for buildings and contents, in the dollars of each year. The most came from Flooding in 1984: 16 claims (39% of all) and $89,000. 56% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 128 Connecticut cities on this site with 10 or more claims, 53 have fewer than Glastonbury.