Longmont, CO Tornado History — 127 Tornadoes Since 1950
How many tornadoes has Longmont, CO had?
Longmont has had 127 tornadoes on record within 25 miles since 1950, including 2 strong to violent (EF3+) tornadoes.
When was the most recent tornado near Longmont?
The most recent tornado within 25 miles of Longmont was an Unrated on June 13, 2025.
When is tornado season in Longmont?
June is historically the peak month for tornadoes near Longmont, with 54 on record. April through June account for 83 of the 127 tornadoes on record near Longmont.
At a Glance
Recent Tornado Activity Near Longmont
The last 20 years of confirmed tornadoes within 25 miles — 18 total, averaging 0.9 per year over this window.
What storm spotters reported near Longmont
One local storm report has been filed within 25 miles of Longmont and since confirmed into the NOAA archive, the earliest on June 13, 2025 and the most recent on June 13, 2025. It is already counted in the Longmont totals above; quoted below is the narrative the reporting office filed at the time.
Landspout tornado confirmed by Denver International Airport observer as well as trained spotter and public sources. Location is approximate. (BOU)
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 Longmont
1 fatality has been recorded within 25 miles of Longmont since 1950, across 1 event. 128 injuries have been reported across all events. 2008 was the deadliest year on record near Longmont.
The deadliest single event was an EF3 on May 22, 2008, which caused 1 fatality along a 38.7-mile track.
Notable Tornadoes Near Longmont
What the record shows near Longmont
The 1990s were the busiest decade near Longmont, with 35 of the 127 confirmed tornadoes within 25 miles; the 2020s have produced 4 so far. The Longmont record runs from the 1950s to today.
Of the tornadoes rated near Longmont, 113 reached EF0 or EF1 and 12 reached EF2 or stronger. The most intense on record near Longmont is rated EF3, of which 2 are logged. A further 2 near Longmont are unrated — events NOAA logged before a damage survey assigned a scale.
Across the last 20 years Longmont has averaged 0.9 confirmed tornadoes a year within 25 miles, 18 in total. 2008 was the busiest of them with 2, and 8 of those years passed with none at all.