Hail HistoryHome › Montana › Cascade County › Great Falls
Hail history for Great Falls, MT
Hail has been reported within 10 miles of Great Falls on 25 days since 2006. The largest stones measured 2.5 in (tennis ball) on Jul 7, 2022. Hail is most common here in June and July.
Great Falls ranks #742 for hail days among the 1,399 U.S. cities of 25,000 to 100,000 people. See the ranking →
Recent hail near Great Falls
| Date | Hail size | Where |
|---|---|---|
| Jul 8, 2026 | 0.5 in marble | Great Falls 1 hail report · closest 2 mi from Great Falls |
| Jul 31, 2025 | 1 in quarter | Great Falls 1 hail report · closest 2 mi from Great Falls |
| Jun 15, 2025 | 1 in quarter | Great Falls, Portage 7 hail reports · closest 2 mi from Great Falls |
One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.
Hail days near Great Falls by year
When hail season peaks near Great Falls
Of the 25 hail days since 2006, most fell in June (9) and July (8).
Largest hail storms near Great Falls
Jul 7, 2022 · 2.5 in (tennis ball) · Great Falls (3 mi from Great Falls)
National Weather Service description (English): Public report estimating 2.5 inch hail via photo 3 miles WNW of Black Eagle.Jun 16, 2007 · 1.75 in (golf ball) · Great Falls (1 mi from Great Falls)
National Weather Service description (English): A severe thunderstorm dropped 1.75 inch diameter hail in downtown Great Falls.May 4, 2014 · 1.75 in (golf ball) · Manchester (9 mi from Great Falls)
National Weather Service description (English): Hail measuring 1.75 inches was reported in Sun Prairie, MT.Jun 6, 2011 · 1.5 in (ping pong ball) · Great Falls (8 mi from Great Falls)
Jun 11, 2016 · 1.5 in (ping pong ball) · Great Falls (1 mi from Great Falls)
Damaging thunderstorm winds near Great Falls
91 reports of damaging thunderstorm wind within 10 miles of Great Falls since 2006, on 51 days. The strongest measured gust was 83 mph on Sep 2, 2026.
| Date | Strongest gust | Where |
|---|---|---|
| Sep 25, 2026 | 52 mph, measured | Malmstrom AFB 1 wind report |
| Sep 2, 2026 | 83 mph, measured | Great Falls, Malmstrom AFB, Sun Prairie 3 wind reports |
| Aug 27, 2026 | 60 mph, measured | Sun Prairie 2 wind reports |
| Jul 18, 2026 | 70 mph, measured | Great Falls, Malmstrom AFB 3 wind reports |
| Jul 17, 2026 | 53 mph, measured | Great Falls 1 wind report |
| Jul 12, 2026 | 64 mph, measured | Great Falls 1 wind report |
| May 13, 2026 | 69 mph, measured | Great Falls Airport, Malmstrom AFB 3 wind reports |
| Dec 26, 2025 | 66 mph, measured | Great Falls Airport 2 wind reports |
| Aug 19, 2025 | 70 mph, measured | Rainbow, Great Falls Airport, Great Falls 3 wind reports |
| Jun 27, 2025 | 59 mph, measured | Great Falls 1 wind report |
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 Great Falls; 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 Great Falls.
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