Avon, CT Tornado History — 71 Tornadoes Since 1950
How many tornadoes has Avon, CT had?
Avon has had 71 tornadoes on record within 25 miles since 1950, including 6 violent (EF3+) tornadoes.
When was the most recent tornado near Avon?
The most recent tornado within 25 miles of Avon was an EF0 on June 21, 2024.
When is tornado season in Avon?
July is historically the peak month for tornadoes near Avon, with 23 on record. Spring through early summer (April–June) generally sees the highest activity across most of the central and southern United States.
At a Glance
Recent Tornado Activity Near Avon
The last 20 years of confirmed tornadoes within 25 miles — 22 total, averaging 1.1 per year over this window.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Casualties on Record Near Avon
7 fatalities have been recorded within 25 miles of Avon since 1950, across 3 events. 848 injuries have been reported across all events. 2011 was the deadliest year on record.
The deadliest single event was a F4 on October 3, 1979, which caused 3 fatalities along a 11.3-mile track.
Notable Tornadoes Near Avon
About Tornadoes in Avon
This overview was written April 23, 2026. The tornado counts and notable-event figures elsewhere on this page reflect the latest data and may differ from this summary.
According to the NOAA Storm Prediction Center, 68 tornadoes have been recorded within 25 miles of Avon, Connecticut since 1950. While tornadoes can occur anywhere given the right atmospheric conditions, this total reflects the region's exposure to severe convective weather, particularly during the summer months when warm, humid air masses interact with frontal boundaries moving through New England.
The distribution of tornado activity has varied considerably by decade. The 1970s saw the highest concentration with 17 recorded events, followed by the 1950s with 12 tornadoes and the 2010s with 13. In contrast, the 1980s recorded only 2 tornadoes within the search radius. July stands out as the peak month for tornado activity, accounting for 23 of the 68 events on record, consistent with the season when atmospheric instability is most pronounced in southern New England.
Most tornadoes near Avon have been relatively weak on the Enhanced Fujita scale, which rates tornado intensity from EF0 to EF5 based on damage indicators. Of the 68 tornadoes recorded, 18 were rated EF0 and 29 were rated EF1, meaning they produced wind speeds below 111 mph. However, stronger tornadoes have occurred: 14 reached EF2 intensity, 5 reached EF3, and one reached EF4. One tornado remains unrated in the historical record.
The most significant tornado event on record occurred on October 3, 1979, when an F4-rated tornado carved an 11.3-mile path with a maximum width of 1,400 yards. This tornado resulted in 3 fatalities and caused $275 million in property damage, making it simultaneously the deadliest, costliest, and widest tornado in the area's recorded history. Another notable event was an EF3 tornado on June 1, 2011, which traveled 37.6 miles—the longest path length on record—and also caused 3 fatalities with $227.6 million in damage. The most recent tornado was an EF0 on June 21, 2024, which traveled 2 miles and caused $15,000 in property damage with no fatalities.