The most recent reported hail day was 2025-08-20, 345 days ago. Hill County is hit in most years. The largest stone on record here is 4.5 inches, a softball and 4.5 times the National Weather Service's 1 inch severe criterion, reported on 2015-07-04 near Havre.
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 2025-08-20, around Havre. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Hill County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
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 45 separate reports between them, two or three on a typical one. 4 of those 17 years produced none at all. The busiest single year was 2020, with 3 hail days. The last five years have been quieter than the long run: 3 days since 2022, against 1.4 a year before that.
Roof-killing hail is routine here: 5 of the 20 days reached 2 inches or more, 25% of them, the last on 2024-07-13. Those big days do not follow the county's usual calendar: most of them fall in July, not June. More than half of every hail day on record here -- 10 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 Havre -- 14 of the county's 20 hail days -- then Kremlin (5), Box Elder (3), Rocky Boy (2) and Gildford (2). That one town is named on 70% of them. Beyond those, NOAA names Hingham, Rudyard and Inverness on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Havre | 4 | 4.50″ |
| 1 ENE Havre | 3 | 2.75″ |
| Rocky Boy | 2 | 2.00″ |
| Box Elder | 2 | 1.75″ |
| 18 N Kremlin | 1 | 3.00″ |
The season runs June through August: 18 of the 20 hail days on record fall in those 3 months (90%). June is the single busiest month, with 7 of them (35%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in May, outside that window. Reports span 4 of the 12 calendar months; the other 8 have never produced one.
| Month | Hail days |
|---|---|
| May | 2 |
| June | 7 |
| July | 7 |
| August | 4 |
That day put 1 report on the map, the biggest 1.25 inches near Havre. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-08-20 | 1.25″ | 1 |
| 2024-07-13 | 3.00″ | 6 |
| 2022-07-06 | 2.50″ | 5 |
| 2020-07-07 | 1.75″ | 2 |
| 2020-06-27 | 1.00″ | 1 |
| 2020-06-21 | 1.00″ | 1 |
| 2019-07-06 | 1.00″ | 1 |
| 2018-05-16 | 1.00″ | 2 |
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 4.5 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: Blaine County (20 hail days), Chouteau County (25) and Toole County (14). Hill County sits in between.
Blaine County · Chouteau County · Toole 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, Hill County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.