Hail HistoryHome › Montana › Sweet Grass County
Hail history for Sweet Grass County, MT
97 hail reports in Sweet Grass County since 2006 on 36 days. The largest stones measured 2.5 in (tennis ball) on Jun 13, 2013.
Recent hail in Sweet Grass County
| Date | Hail size | Where |
|---|---|---|
| Jun 16, 2025 | 1 in quarter | Big Timber 1 hail report |
| Jun 14, 2025 | 1.25 in half dollar | Melville 1 hail report |
One row per day: the largest hail reported in the county that day, the places and the number of reports.
Hail days in Sweet Grass County by year
When hail season peaks in Sweet Grass County
Damaging thunderstorm winds in Sweet Grass County
54 reports of damaging thunderstorm wind in Sweet Grass County since 2006, on 38 days. The strongest measured gust was 70 mph on Jun 29, 2013.
| Date | Strongest gust | Where |
|---|---|---|
| Sep 7, 2026 | 52 mph, measured | Limestone 1 wind report |
| Aug 29, 2026 | 51 mph, measured | Greycliff 1 wind report |
| Aug 27, 2026 | 50 mph, measured | Sourdough 1 wind report |
| Aug 23, 2026 | 55 mph, measured | Big Timber, Sourdough 2 wind reports |
| Aug 18, 2026 | 52 mph, measured | Big Timber 1 wind report |
| Jul 31, 2026 | 43 mph, measured | Sourdough 1 wind report |
| Jul 30, 2026 | 51 mph, measured | Melville 1 wind report |
| Jul 28, 2026 | 58 mph, measured | Sourdough, Greycliff, Limestone 4 wind reports |
| Jul 25, 2026 | 62 mph, measured | Big Timber 1 wind report |
| Jul 12, 2026 | 61 mph, measured | Melville 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 Sweet Grass 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).