Dedham, MA Tornado History — 54 Tornadoes Since 1950
How many tornadoes has Dedham, MA had?
Dedham has had 54 tornadoes on record within 25 miles since 1950, including 3 strong to violent (EF3+) tornadoes.
When was the most recent tornado near Dedham?
The most recent tornado within 25 miles of Dedham was an EF0 on September 6, 2025.
When is tornado season in Dedham?
July is historically the peak month for tornadoes near Dedham, with 15 on record. April through June account for 13 of the 54 tornadoes on record near Dedham.
At a Glance
Recent Tornado Activity Near Dedham
The last 20 years of confirmed tornadoes within 25 miles — 17 total, averaging 0.8 per year over this window.
What storm spotters reported near Dedham
One local storm report has been filed within 25 miles of Dedham and since confirmed into the NOAA archive, the earliest on September 6, 2025 and the most recent on September 6, 2025. It is already counted in the Dedham totals above; quoted below is the narrative the reporting office filed at the time.
AN EF1 TORNADO TOUCHED DOWN IN STOW... MA NEAR MAPLE STREET AND CONTINUED ENE OVER BOSE AVENUE CAUSING SIGNIFICANT TREE DAMAGE. THE TORNADO LIFTED SOMEWHERE NEAR HARVES (BOX)
Source: National Weather Service and trained-spotter local storm reports, relayed by the NOAA Storm Prediction Center.
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 Dedham
95 fatalities have been recorded within 25 miles of Dedham since 1950, across 2 events. 1,269 injuries have been reported across all events. 1953 was the deadliest year on record near Dedham.
The deadliest single event was an F4 on June 9, 1953, which caused 94 fatalities along a 34.9-mile track.
Notable Tornadoes Near Dedham
What the record shows near Dedham
The 2020s are the busiest decade on record so far near Dedham, with 11 of the 54 confirmed tornadoes within 25 miles. The Dedham record runs from the 1950s to today.
Of the tornadoes rated near Dedham, 44 reached EF0 or EF1 and 10 reached EF2 or stronger. The most intense on record near Dedham is rated EF4, of which 1 is logged.
Across the last 20 years Dedham has averaged 0.8 confirmed tornadoes a year within 25 miles, 17 in total. 2023 was the busiest of them with 5, and 10 of those years passed with none at all.