Hail History

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Hail history for Boulder County, CO

Last hail in the countyJul 28, 20261.00 in (25-sent koin)
Hail dei, las 12 mɔn1
Biges hail sin 20063.00 in (ti kap)Jun 18, 2018
Hail dei sin 200667
Dei wit hail 1 inch o mɔ45
Tornadoes in the county1
Win ripɔt we win blow bad insay kɔnti21

209 hail reports in Boulder County since 2006 on 67 days. Biggest stones measured 3.00 in (ti kap) on Jun 18, 2018.

Cities in Boulder County

Recent hail in Boulder County

DeitHail saizWeaSors
Jul 28, 20261.00 in
25-sent koin		Lyons
1 hail report		NWS storm report (preliminary)
Aug 10, 20251.00 in
25-sent koin		Niwot, Lafayette
5 hail reports		NOAA Storm Events
Jul 11, 20251.00 in
25-sent koin		Louisville, Niwot, Lafayette
4 hail reports		NOAA Storm Events
Jun 17, 20251.00 in
25-sent koin		Louisville, Lafayette
5 hail reports		NOAA Storm Events
May 18, 20251.00 in
25-sent koin		Marshall
2 hail reports		NOAA Storm Events

One row per day: biggest hail reported in the county that day, places and number of reports.

Hail days in Boulder County by year

30660710880941011112113314315116217818719220221422423224425126

When hail season peaks in Boulder County

JanFeb1Mar2Apr16May20Jun18Jul7Aug2Sep1OctNovDec

Strong thunderstorm wind in Boulder County

21 reports of strong thunderstorm wind in Boulder County since 2006, on 16 de. Di strongest gust we dem measure na 75 mph on Jul 10, 2011.

DeitStrongest gustWeaSors
Jul 28, 202655 mph, we kin mekaPinewood Springs
1 win ripɔt		NWS storm report (preliminary)
Jul 20, 202461 mph, we kin mekaNiwot
1 win ripɔt		NOAA Storm Events
Jul 31, 202361 mph, we kin mekaSuperior
1 win ripɔt		NOAA Storm Events
Jun 6, 202063 mph, we kin mekaGold Hill, Louisville
2 win ripɔt		NOAA Storm Events
Jun 28, 201958 mph, we kin mekaLongmont Muni Airport
1 win ripɔt		NOAA Storm Events
Jun 17, 201962 mph, we kin mekaBoulder Airport
1 win ripɔt		NOAA Storm Events
Aug 3, 201867 mph, we kin mekaGold Hill, Boulder
2 win ripɔt		NOAA Storm Events
Aug 4, 201770 mph, we tinkNiwot
1 win ripɔt		NOAA Storm Events
Mar 30, 201472 mph, we kin mekaLongmont
1 win ripɔt		NOAA Storm Events
Sep 18, 201366 mph, we kin mekaBoulder
1 win ripɔt		NOAA Storm Events

Big tɔnda win na win we blow 58 mph o pass, o win we mek damij. Dem kin meka win long weza steshɔn; dem kin tink long pipul we si win an damij.

Wan yu fi file claim for roof or kaar hail?

Insurers ask for di date of loss. Di dates on dis page na wen dem report hail na near Boulder County; hail fit hit one street and miss di next, so a report no prove damage for yu address. A licensed roofer or yu insurance adjuster fit inspect di roof. Many policies set a time limit for filing claim — check yours.

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).