Hail History

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Hail history for Longmont, CO

Last hail within 10 milesJul 28, 20261 in (quarter)
Hail days, last 12 months2
Largest hail since 20062.5 in (tennis ball)Jun 4, 2015
Hail days since 200654
Days with hail 1 inch or larger40
Tornadoes within 10 miles4
Damaging wind reports within 10 miles17

Hail has been reported within 10 miles of Longmont on 54 days since 2006. The largest stones measured 2.5 in (tennis ball) on Jun 4, 2015. Hail is most common here in May and June.

Longmont ranks #199 for hail days among the 1,399 U.S. cities of 25,000 to 100,000 people. See the ranking →

Recent hail near Longmont

DateHail sizeWhereSource
Jul 28, 20261 in
quarter		Lyons
1 hail report · closest 10 mi from Longmont		NWS storm report (preliminary)
Jun 24, 20261.75 in
golf ball		Berthoud
3 hail reports · closest 9 mi from Longmont		NOAA Storm Events
Aug 10, 20251 in
quarter		Niwot, Lafayette
5 hail reports · closest 8 mi from Longmont		NOAA Storm Events
Jul 11, 20250.75 in
penny		Niwot
1 hail report · closest 8 mi from Longmont		NOAA Storm Events
Jun 25, 20251 in
quarter		Firestone
2 hail reports · closest 8 mi from Longmont		NOAA Storm Events
Jun 17, 20251 in
quarter		Lafayette, Erie
3 hail reports · closest 9 mi from Longmont		NOAA Storm Events
May 18, 20250.75 in
penny		Mead
1 hail report · closest 7 mi from Longmont		NOAA Storm Events
May 14, 20251.25 in
half dollar		Erie, Frederick
5 hail reports · closest 8 mi from Longmont		NOAA Storm Events

One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.

Hail days near Longmont by year

20620720870910111121131142151611781871942021322323224625226

When hail season peaks near Longmont

Of the 54 hail days since 2006, most fell in May (15) and June (14).

JanFebMar1Apr15May14Jun14Jul6Aug3Sep1OctNovDec

Largest hail storms near Longmont

Jun 4, 2015 · 2.5 in (tennis ball) · Lyons (10 mi from Longmont)

May 22, 2008 · 2 in (hen egg) · Liberty (2 mi from Longmont)

May 9, 2023 · 2 in (hen egg) · Erie (9 mi from Longmont)

Jun 28, 2013 · 1.75 in (golf ball) · Lyons (10 mi from Longmont)

Jun 18, 2018 · 1.75 in (golf ball) · Mead (7 mi from Longmont)

Tornadoes within 10 miles of Longmont

DateRatingWherePath
Jun 4, 2015EF3Highland
6 mi from Longmont		5.8 mi long, 440 yd wide
Jun 4, 2015EF3Berthoud
8 mi from Longmont		0.9 mi long, 440 yd wide
Aug 3, 2013EF0Erie
8 mi from Longmont		0.1 mi long, 50 yd wide
Jun 9, 2009EF0Liberty
6 mi from Longmont		0.1 mi long, 50 yd wide

Damaging thunderstorm winds near Longmont

17 reports of damaging thunderstorm wind within 10 miles of Longmont since 2006, on 12 days. The strongest measured gust was 72 mph on Mar 30, 2014.

DateStrongest gustWhereSource
Jul 20, 202464 mph, measuredBerthoud, Niwot
3 wind reports		NOAA Storm Events
Jun 6, 202081 mph, estimatedFirestone
1 wind report		NOAA Storm Events
Jun 28, 201958 mph, measuredLongmont Muni Airport
1 wind report		NOAA Storm Events
Aug 4, 201860 mph, measuredFirestone
1 wind report		NOAA Storm Events
Jul 25, 201881 mph, estimatedErie
1 wind report		NOAA Storm Events
Aug 4, 201770 mph, estimatedNiwot
1 wind report		NOAA Storm Events
Jul 14, 201460 mph, measuredPlumbs
1 wind report		NOAA Storm Events
Mar 30, 201472 mph, measuredLongmont, Firestone, Liberty
3 wind reports		NOAA Storm Events
Aug 3, 201368 mph, measuredErie
1 wind report		NOAA Storm Events
Sep 3, 201268 mph, measuredHygiene, Longmont
2 wind reports		NOAA Storm Events

Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.

Filing a roof or car hail claim?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Longmont; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.

Nearby cities

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Longmont.

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