Montana hail history
IndependentNot affiliated with NOAA or the National Weather Service.
Montana had hail reported on 285 days from 2016 to 2025, about 29 a year, and on 1,583 days since 1955. The largest hailstone on record in the state is 6.00″ (June 3, 1971). Yellowstone County had the most hail days of any county from 2016 to 2025 (43).
Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology
Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.
Report counts rose over the decades as more people and spotters reported storms, so compare recent years with each other rather than with the 1960s.
Montana cities with the most hail days, 2016–2025
| City | Hail days 2016–25 | 1″+ hail days | Largest hail | Last hail |
|---|---|---|---|---|
| Billings | 19 | 13 | 3.50″ | Aug 7, 2025 |
| Great Falls | 13 | 13 | 2.50″ | Jul 31, 2025 |
| Laurel | 12 | 8 | 1.75″ | Jun 16, 2025 |
| Miles City | 8 | 5 | 2.50″ | Jun 20, 2025 |
| Hardin | 8 | 4 | 3.00″ | Aug 7, 2025 |
| Havre | 7 | 6 | 2.75″ | Aug 20, 2025 |
| Wolf Point | 7 | 7 | 3.50″ | Aug 24, 2024 |
| Lewistown | 6 | 6 | 2.50″ | Jun 15, 2025 |
| Glasgow | 6 | 5 | 4.50″ | Jun 15, 2025 |
| Bozeman | 6 | 5 | 2.00″ | Aug 6, 2024 |
| Glendive | 5 | 5 | 4.00″ | Aug 7, 2025 |
| Hamilton | 4 | 4 | 1.75″ | Jul 8, 2022 |
| Missoula | 3 | 3 | 2.50″ | Aug 6, 2024 |
| Dillon | 3 | 3 | 1.75″ | Sep 3, 2024 |
| Red Lodge | 3 | 1 | 3.00″ | Jun 16, 2025 |
| Columbia Falls | 3 | 3 | 1.25″ | May 11, 2025 |
| Sidney | 2 | 2 | 2.00″ | Jun 10, 2021 |
| Kalispell | 2 | 2 | 2.50″ | May 28, 2026 |
| Belgrade | 2 | 1 | 2.75″ | Jul 4, 2021 |
| Deer Lodge | 1 | 1 | 1.75″ | Jul 27, 2018 |
Biggest hail days in Montana since 2016
| Day | Largest hail | Reports |
|---|---|---|
| July 13, 2024 | 4.00″ | 20 |
| August 9, 2016 | 4.00″ | 19 |
| June 8, 2021 | 4.00″ | 17 |
| July 12, 2024 | 4.00″ | 6 |
| June 15, 2025 | 3.50″ | 32 |
| June 18, 2016 | 3.50″ | 19 |
| September 6, 2026 | 3.25″ | 17 |
| August 11, 2019 | 3.00″ | 49 |
| June 10, 2021 | 3.00″ | 41 |
| July 7, 2022 | 3.00″ | 40 |
| July 11, 2023 | 3.00″ | 17 |
| June 9, 2021 | 3.00″ | 14 |
The largest hail and the biggest storm days since 1955, with radar swaths since 2019: Biggest hail storms in Montana history
Montana counties
| County | Hail days 2016–25 | All-time hail reports | Largest hail | Last hail |
|---|---|---|---|---|
| Yellowstone County | 43 | 495 | 3.50″ | Sep 6, 2026 |
| Powder River County | 40 | 366 | 6.00″ | Jul 8, 2026 |
| Valley County | 39 | 464 | 4.50″ | Sep 11, 2025 |
| Carter County | 35 | 296 | 4.50″ | Aug 17, 2026 |
| Rosebud County | 31 | 334 | 6.00″ | Jul 5, 2025 |
| Fergus County | 31 | 268 | 4.50″ | Sep 6, 2026 |
| Big Horn County | 31 | 252 | 4.00″ | Jun 27, 2026 |
| Stillwater County | 30 | 177 | 2.75″ | Aug 7, 2025 |
| Roosevelt County | 27 | 241 | 3.50″ | Sep 2, 2026 |
| Custer County | 26 | 237 | 4.50″ | Jul 29, 2025 |
| Garfield County | 25 | 290 | 3.00″ | Jul 31, 2025 |
| Cascade County | 25 | 258 | 3.00″ | Sep 13, 2026 |
| Dawson County | 24 | 244 | 4.00″ | Jun 6, 2026 |
| Fallon County | 23 | 184 | 4.00″ | Jun 27, 2026 |
| McCone County | 21 | 234 | 4.50″ | Jun 27, 2026 |
| Petroleum County | 21 | 115 | 3.50″ | Jul 17, 2025 |
| Prairie County | 20 | 187 | 4.50″ | Aug 20, 2025 |
| Judith Basin County | 20 | 159 | 4.00″ | Sep 13, 2026 |
| Musselshell County | 20 | 233 | 4.50″ | Jul 16, 2026 |
| Phillips County | 19 | 274 | 3.25″ | Sep 6, 2026 |
| Sheridan County | 19 | 193 | 3.00″ | Sep 12, 2025 |
| Carbon County | 19 | 118 | 4.00″ | Jun 27, 2026 |
| Wibaux County | 17 | 127 | 3.00″ | Jun 27, 2026 |
| Richland County | 16 | 216 | 2.50″ | Jun 27, 2026 |
| Blaine County | 15 | 102 | 4.00″ | Jul 26, 2025 |
| Wheatland County | 14 | 109 | 2.75″ | Jul 27, 2025 |
| Park County | 14 | 57 | 1.75″ | Jul 29, 2025 |
| Hill County | 13 | 112 | 3.50″ | Aug 23, 2026 |
| Golden Valley County | 13 | 125 | 2.75″ | Jul 16, 2026 |
| Ravalli County | 13 | 85 | 2.75″ | Jul 9, 2022 |
| Glacier County | 13 | 75 | 1.75″ | Jun 10, 2025 |
| Jefferson County | 13 | 59 | 2.00″ | Jul 16, 2026 |
| Teton County | 12 | 102 | 3.00″ | Jul 17, 2026 |
| Missoula County | 12 | 114 | 2.50″ | Aug 14, 2026 |
| Daniels County | 12 | 160 | 4.00″ | Jul 2, 2026 |
| Sweet Grass County | 12 | 130 | 2.50″ | Jun 16, 2025 |
| Lewis and Clark County | 11 | 125 | 3.00″ | Sep 6, 2026 |
| Chouteau County | 10 | 160 | 2.75″ | Jun 15, 2025 |
| Treasure County | 10 | 91 | 2.75″ | Jun 30, 2024 |
| Gallatin County | 10 | 92 | 2.75″ | Aug 19, 2024 |
| Powell County | 10 | 60 | 2.00″ | Sep 6, 2026 |
| Flathead County | 8 | 102 | 2.75″ | Jul 17, 2026 |
| Granite County | 8 | 30 | 2.00″ | Jul 9, 2022 |
| Toole County | 7 | 57 | 2.75″ | Jul 27, 2025 |
| Liberty County | 7 | 53 | 3.00″ | Jun 25, 2026 |
| Beaverhead County | 7 | 54 | 2.75″ | Sep 6, 2026 |
| Lake County | 7 | 47 | 2.00″ | Aug 19, 2024 |
| Broadwater County | 7 | 27 | 2.00″ | Jul 28, 2025 |
| Meagher County | 5 | 45 | 2.50″ | Jun 21, 2024 |
| Silver Bow County | 5 | 44 | 2.50″ | Aug 10, 2019 |
| Pondera County | 4 | 75 | 4.50″ | Jul 18, 2026 |
| Madison County | 4 | 30 | 1.75″ | Aug 29, 2026 |
| Sanders County | 3 | 25 | 1.75″ | Jul 16, 2026 |
| Deer Lodge County | 2 | 23 | 1.75″ | Sep 6, 2026 |
| Lincoln County | 2 | 15 | 3.00″ | Jun 15, 2021 |
| Mineral County | 2 | 14 | 2.00″ | Aug 10, 2019 |
Places with fewer than 5 hail days on record are listed without a link and kept out of search engines.
When hail falls in Montana, by month and week: Montana hail season
Download every Montana hail, tornado and wind report as CSV, by year: Montana storm report downloads
All Montana cities
Belgrade Billings Bozeman Columbia Falls Cut Bank Deer Lodge Dillon Glasgow Glendive Great Falls Hamilton Hardin Havre Helena Kalispell Laurel Lewistown Libby Livingston Miles City Missoula Red Lodge Shelby Sidney Whitefish Wolf Point
Guides: How to check if it hailed at your address · Hail size chart and roof damage