Hurricanes and Tornadoes That Hit Andover, CT

The nearest NOAA station with 1991–2020 climate normals is Storrs, CT, 8 miles northeast of Andover at 665 feet. July is the warmest, with an average high of 81°F and low of 63°F; January is the coolest, at 35°F and 19°F. October is the wettest at 4.6 inches of precipitation on average and February the driest at 3.0 inches; the year adds up to 49.3 inches over 84 days with at least a tenth of an inch. June to November, the hurricane season months, bring 52% of the year's precipitation (25.8 of 49.3 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 73°F and 4.5 inches of precipitation. Highs reach 90°F on about 3 days a year, almost all from July. Lows fall below freezing on about 123 nights a year. Snowfall averages 39.0 inches a year, most of it in February. That 49.3 inches is more than at 12 of the 27 Connecticut stations used on this site (44%). Columbia, 5 miles southeast, has its own station (Willimantic Windham Airport, CT): 43.5 inches a year, 5.8 less than here, and a July average high of 83°F against 81°F.

Since 1996, the National Weather Service has logged 207 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Andover: 151 thunderstorm wind reports, 31 floods, 16 flash floods, 8 lightning strikes and 1 heavy rain event. They killed 1 person and injured 3, and the NWS estimated $2.1 million in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on August 10, 2012. September has had the most flash floods, 9 of 16. Of the 186 Connecticut cities on this site with a flash flood on record, 53 have had fewer than Andover.