The most recent reported hail day was 2025-07-26, 370 days ago. Blaine County is hit in most years. The largest stone on record here is 4 inches, a grapefruit and 4 times the National Weather Service's 1 inch severe criterion, reported on 2024-07-13 near Hays.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Montana. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2025-07-26, around Turner. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Blaine County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 20 separate hail days here since 2010 -- 1.2 a year over 17 years of record. Those days carry 43 separate reports between them, two or three on a typical one. 5 of those 17 years produced none at all. The busiest single year was 2016, with 3 hail days. The last five years track the long-run rate, with 5 days since 2022.
Roof-killing hail is routine here: 7 of the 20 days reached 2 inches or more, 35% of them, the last on 2024-07-13. Those big days do not follow the county's usual calendar: most of them fall in June, not July. More than half of every hail day on record here -- 11 of 20 -- reached golf-ball size, 1.75 inches or bigger.
Across the whole of Montana, see the Montana hail map and history.
Reports cluster nearest Chinook -- 7 of the county's 20 hail days -- then Turner (6), Hays (5), Harlem (3) and Fort Belknap (3). Beyond those, NOAA names Hogeland and Lloyd on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Turner | 4 | 1.75″ |
| 10 S Chinook | 2 | 2.50″ |
| 13 Nnw Hays | 2 | 2.00″ |
| Chinook | 2 | 2.00″ |
| 15 Ese Lloyd | 2 | 1.75″ |
The season runs June through July: 18 of the 20 hail days on record fall in those 2 months (90%). July is the single busiest month, with 12 of them (60%). Hail has also been reported in May and August, outside that window. Reports span 4 of the 12 calendar months; the other 8 have never produced one.
| Month | Hail days |
|---|---|
| May | 1 |
| June | 6 |
| July | 12 |
| August | 1 |
That day put 1 report on the map, the biggest 1.75 inches near Turner. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-07-26 | 1.75″ | 1 |
| 2024-07-13 | 4.00″ | 8 |
| 2024-07-05 | 1.00″ | 1 |
| 2023-07-30 | 2.50″ | 5 |
| 2022-07-06 | 2.50″ | 2 |
| 2021-07-06 | 1.75″ | 2 |
| 2021-06-09 | 2.50″ | 4 |
| 2020-07-07 | 1.00″ | 1 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 4 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own: Phillips County (36 hail days), Hill County (20) and Fergus County (48). Blaine County sits in between.
Phillips County · Hill County · Fergus County
Back to the Montana hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Blaine County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.