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Hail reports Montana

No hail reports arrived in Montana in the last 24 hours. The state averages about 236 reports a year, and its largest stone on record measured 4.50 inches at Roundup on Jun 26, 1996.

From 2005 through 2025, the Storm Events Database logs about 236 hail reports in Montana a year, across about 33 days.

Largest hailstones on record in Montana

Largest hailstones recorded in Montana since 1996, Storm Events Database
DiameterSizePlaceDate
4.50 inchesGrapefruitRoundup, Musselshell CountyJun 26, 1996
4.50 inchesGrapefruitWinifred, Fergus CountyJun 26, 1996
4.50 inchesGrapefruitWeldon, McCone CountyJul 18, 1999
4.50 inchesGrapefruitGlasgow, Valley CountyJul 21, 1999
4.50 inchesGrapefruitBroadus, Powder River CountyJul 18, 2001
4.50 inchesGrapefruitVida, McCone CountyJul 20, 2001
4.50 inchesGrapefruitVida, McCone CountyJul 20, 2001
4.50 inchesGrapefruitAlzada, Carter CountyJun 18, 2002
4.25 inchesSoftballHinsdale, Valley CountyJul 11, 2004
4.25 inchesSoftballRoundup, Musselshell CountyJun 24, 2007

Record figures come from the Storm Events Database at NCEI, a reviewed log that trails live reports by 2 to 3 months. Records start in 1996 and averages cover 2005-2025.

Hail reports by month

Average hail reports per month in Montana, 2005 to 2025
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Reports0.00.00.012786823450.00.00.0

Counties in Montana with the most hail reports

Counties in Montana with the most hail reports a year, 2005 to 2025
CountyReports a year
Yellowstone15.4
Valley13.7
Powder River11.3
Garfield8.7
Carter8.5
Rosebud8.4
Phillips8.0
Dawson7.4
Roosevelt7.3
Big Horn7.2

Cities in Montana with hail data

Tracked cities in Montana with average hail reports a year within 25 miles and the largest on record
CityReports a yearLargest since 1996
Billings14.53.00 inches Jul 5, 1996
Missoula2.62.50 inches Jul 3, 1998

National Weather Service offices file Local Storm Reports; the Iowa Environmental Mesonet of Iowa State University relays them to this page, where they appear as live spotter reports. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.

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