Hail history · Montana
Montana hail history
Hail days, largest hail and the latest storms for 56 Montana counties, from NOAA storm reports since 2010.
1,714 hail reports and 2,580 damaging-wind reports in Montana since 2010; the largest hail was 4.00" (softball) in Carter County on Aug 9, 2016. Counties are sorted by the number of days with hail reports.
| County | Hail days since 2010 | Last 5 years | Largest hail | Last hail |
|---|---|---|---|---|
| Carter County | 35 | 12 | 4.00" | Aug 17, 2026 |
| Valley County | 35 | 14 | 4.00" | Sep 11, 2025 |
| Fergus County | 34 | 14 | 3.00" | Sep 6, 2026 |
| Powder River County | 34 | 14 | 2.75" | Jul 8, 2026 |
| Yellowstone County | 34 | 16 | 3.00" | Sep 7, 2026 |
| Cascade County | 28 | 11 | 3.00" | Sep 13, 2026 |
| Roosevelt County | 28 | 11 | 3.50" | Sep 2, 2026 |
| Big Horn County | 27 | 10 | 2.75" | Jun 27, 2026 |
| Rosebud County | 27 | 8 | 2.75" | Jul 5, 2025 |
| Stillwater County | 27 | 8 | 2.75" | Aug 7, 2025 |
| Judith Basin County | 25 | 10 | 2.50" | Sep 13, 2026 |
| Dawson County | 24 | 8 | 4.00" | Jun 6, 2026 |
| Garfield County | 24 | 8 | 2.75" | Jul 31, 2025 |
| Custer County | 23 | 9 | 2.75" | Jul 29, 2025 |
| Fallon County | 23 | 12 | 3.00" | Jun 27, 2026 |
| McCone County | 22 | 9 | 2.50" | Jun 27, 2026 |
| Musselshell County | 21 | 7 | 2.50" | Jul 16, 2026 |
| Petroleum County | 20 | 6 | 3.50" | Jul 17, 2025 |
| Phillips County | 20 | 8 | 3.25" | Sep 7, 2026 |
| Prairie County | 19 | 8 | 3.00" | Aug 21, 2025 |
| Sheridan County | 19 | 5 | 2.00" | Sep 12, 2025 |
| Richland County | 18 | 5 | 2.00" | Jun 27, 2026 |
| Carbon County | 16 | 6 | 2.00" | Jun 27, 2026 |
| Wibaux County | 16 | 5 | 3.00" | Jun 27, 2026 |
| Blaine County | 14 | 5 | 4.00" | Jul 26, 2025 |
| Daniels County | 14 | 9 | 2.50" | Jul 2, 2026 |
| Golden Valley County | 13 | 5 | 2.50" | Jul 16, 2026 |
| Jefferson County | 13 | 4 | 1.50" | Jul 16, 2026 |
| Missoula County | 13 | 8 | 2.50" | Aug 14, 2026 |
| Ravalli County | 13 | 5 | 1.50" | Jul 9, 2022 |
| Teton County | 13 | 6 | 2.75" | Jul 17, 2026 |
| Glacier County | 12 | 3 | 1.75" | Jun 10, 2025 |
| Hill County | 12 | 4 | 3.00" | Aug 23, 2026 |
| Lewis and Clark County | 12 | 4 | 1.50" | Sep 6, 2026 |
| Wheatland County | 11 | 5 | 2.00" | Jul 27, 2025 |
| Flathead County | 10 | 5 | 2.50" | Jul 17, 2026 |
| Sweet Grass County | 10 | 3 | 1.75" | Jun 16, 2025 |
| Beaverhead County | 9 | 4 | 1.75" | Sep 6, 2026 |
| Chouteau County | 9 | 4 | 2.50" | Jun 15, 2025 |
| Gallatin County | 9 | 6 | 1.75" | Aug 19, 2024 |
| Park County | 9 | 2 | 1.75" | Jul 29, 2025 |
| Powell County | 9 | 3 | 1.75" | Sep 6, 2026 |
| Treasure County | 8 | 1 | 2.00" | Jun 30, 2024 |
| Broadwater County | 7 | 2 | 2.00" | Jul 28, 2025 |
| Lake County | 7 | 6 | 1.50" | Aug 19, 2024 |
| Liberty County | 7 | 3 | 2.50" | Jun 25, 2026 |
| Toole County | 7 | 5 | 1.75" | Jul 27, 2025 |
| Granite County | 5 | 0 | 2.00" | Jul 21, 2021 |
| Meagher County | 5 | 2 | 1.50" | Jun 21, 2024 |
| Pondera County | 5 | 3 | 1.75" | Jul 18, 2026 |
| Silver Bow County | 5 | 0 | 1.50" | Aug 10, 2019 |
| Deer Lodge County | 4 | 3 | 1.50" | Sep 6, 2026 |
| Madison County | 4 | 3 | 1.75" | Aug 29, 2026 |
| Sanders County | 4 | 4 | 1.50" | Jul 16, 2026 |
| Lincoln County | 2 | 0 | 1.00" | Jun 15, 2021 |
| Mineral County | 2 | 0 | 1.75" | Aug 10, 2019 |
Source: NOAA Storm Prediction Center storm reports (final Storm Data through Dec 28, 2025; preliminary reports through Oct 9, 2026). Hail 1 inch or larger and damaging wind (58 mph or more, or reported damage). Counts are reports, not damage claims; many storms go unreported. Dates are CST. About the data