Hail History

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Hail history for Jefferson County, CO

Last hail in the countyAug 26, 20260.75 in (penny)
Hail days, last 12 months4
Largest hail since 20062.75 in (baseball)May 8, 2017
Hail days since 200688
Days with hail 1 inch or larger67
Damaging wind reports in the county32

300 hail reports in Jefferson County since 2006 on 88 days. The largest stones measured 2.75 in (baseball) on May 8, 2017.

Cities in Jefferson County

Recent hail in Jefferson County

DateHail sizeWhereSource
Aug 26, 20260.75 in
penny		Wheat Ridge, Lakewood
2 hail reports		NWS storm report (preliminary)
Jun 26, 20261 in
quarter		Broomfield
1 hail report		NOAA Storm Events
Jun 24, 20261 in
quarter		Bergen Park, Morrison
3 hail reports		NOAA Storm Events
Jun 8, 20261.75 in
golf ball		Kittredge, Arvada, Golden
18 hail reports		NOAA Storm Events
Aug 23, 20251.5 in
ping pong ball		Conifer, Bergen Park, Evergreen
5 hail reports		NOAA Storm Events
Aug 10, 20250.75 in
penny		Jefferson Co Airport
1 hail report		NOAA Storm Events
Jul 6, 20251.5 in
ping pong ball		Wheat Ridge, Edgewater
2 hail reports		NOAA Storm Events
Jun 17, 20250.75 in
penny		Lakewood, Pleasant View
3 hail reports		NOAA Storm Events
May 14, 20250.75 in
penny		Arvada
1 hail report		NOAA Storm Events

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

Hail days in Jefferson County by year

4064073088093105112121131014515616317718419120221122723324525426

When hail season peaks in Jefferson County

JanFebMar1Apr18May24Jun17Jul24Aug4SepOctNovDec

Damaging thunderstorm winds in Jefferson County

32 reports of damaging thunderstorm wind in Jefferson County since 2006, on 16 days. The strongest measured gust was 78 mph on Jun 6, 2020.

DateStrongest gustWhereSource
Aug 30, 202660 mph, measuredWhite Ranch Open Sp, Rocky Flats
2 wind reports		NWS storm report (preliminary)
Aug 26, 202658 mph, measuredWheat Ridge
1 wind report		NWS storm report (preliminary)
Jul 24, 202670 mph, measuredRocky Flats, White Ranch Open
3 wind reports		NWS storm report (preliminary)
Jul 10, 202564 mph, measuredJefferson Co Airport, Golden
2 wind reports		NOAA Storm Events
Jul 27, 202266 mph, measuredColumbine
1 wind report		NOAA Storm Events
Jun 25, 202060 mph, measuredJefferson Co Airport
1 wind report		NOAA Storm Events
Jun 24, 202067 mph, measuredJefferson Co Airport
2 wind reports		NOAA Storm Events
Jun 6, 202078 mph, measuredColumbine, Morrison, Lakewood
7 wind reports		NOAA Storm Events
Aug 14, 201860 mph, estimatedPleasant View
1 wind report		NOAA Storm Events
Aug 3, 201862 mph, measuredJefferson Co Airport
1 wind report		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 Jefferson County; 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.

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