Hail History

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Hail history for Lewistown, MT

Last hail within 10 milesSep 6, 20261 in (quarter)
Hail days, last 12 months1
Largest hail since 20062.75 in (baseball)Jul 2, 2007
Hail days since 200616
Days with hail 1 inch or larger13
Damaging wind reports within 10 miles32

Hail has been reported within 10 miles of Lewistown on 16 days since 2006. The largest stones measured 2.75 in (baseball) on Jul 2, 2007. Hail is most common here in July and June.

Recent hail near Lewistown

DateHail sizeWhereSource
Sep 6, 20261 in
quarter		Lewistown
1 hail report · closest 8 mi from Lewistown		NWS storm report (preliminary)
Jun 15, 20252.5 in
tennis ball		Lewiston Muni Airport
1 hail report · closest 2 mi from Lewistown		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 Lewistown by year

10620708109110111121131141516171181191201212222324125126

When hail season peaks near Lewistown

Of the 16 hail days since 2006, most fell in July (7) and June (4).

JanFebMarApr3May4Jun7JulAug2SepOctNovDec

Largest hail storms near Lewistown

Jul 2, 2007 · 2.75 in (baseball) · Lewistown (8 mi from Lewistown)

National Weather Service description (English): A severe thunderstorm dropped 2.75 inch diameter hail at Lewistown 8E.

Jun 15, 2025 · 2.5 in (tennis ball) · Lewiston Muni Airport (2 mi from Lewistown)

National Weather Service description (English): Trained spotter reports egg to tennis ball size hail. Images were provided.

Jul 13, 2011 · 1.75 in (golf ball) · Lewistown (4 mi from Lewistown)

National Weather Service description (English): A thunderstorm dropped 1.75 inch diameter hail at Lewistown 4W.

Jun 1, 2023 · 1.5 in (ping pong ball) · Lewistown (2 mi from Lewistown)

Jun 21, 2018 · 1.25 in (half dollar) · Forestgrove (9 mi from Lewistown)

Damaging thunderstorm winds near Lewistown

32 reports of damaging thunderstorm wind within 10 miles of Lewistown since 2006, on 23 days. The strongest measured gust was 72 mph on Jul 7, 2021.

DateStrongest gustWhereSource
Jul 25, 202661 mph, measuredLewistown
1 wind report		NWS storm report (preliminary)
Jul 14, 202659 mph, measuredLewistown
3 wind reports		NWS storm report (preliminary)
Jul 12, 202657 mph, measuredLewistown
1 wind report		NWS storm report (preliminary)
Jul 2, 202558 mph, estimatedLewistown
2 wind reports		NOAA Storm Events
Oct 21, 202462 mph, measuredLewiston Muni Airport
1 wind report		NOAA Storm Events
Aug 19, 202464 mph, estimatedLewistown
1 wind report		NOAA Storm Events
Sep 3, 202360 mph, measuredLewiston Muni Airport
2 wind reports		NOAA Storm Events
Aug 4, 202258 mph, measuredLewiston Muni Airport
1 wind report		NOAA Storm Events
Jul 7, 202181 mph, estimatedLewistown, Lewiston Muni Airport
4 wind reports		NOAA Storm Events
Sep 13, 201962 mph, measuredLewiston Muni 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 Lewistown; 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). Distances are measured from the center of Lewistown.

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