The most recent reported hail day was 2025-06-15 -- 1 year ago, with nothing reported since. Chouteau County is hit in most years. The largest stone on record here is 2.75 inches, a baseball and 2.8 times the National Weather Service's 1 inch severe criterion, reported on 2012-06-04 near Floweree.
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 2025-06-15, around Highwood. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Chouteau 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 25 separate hail days here since 2010 -- 1.5 a year over 17 years of record. Those days carry 48 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 2024, with 3 hail days. The last five years have been quieter than the long run: 5 days since 2022, against 1.7 a year before that.
6 of the 25 days reached 2 inches or more -- 24%, or about one hail day in 4, the last on 2025-06-15. Those big days do not follow the county's usual calendar: most of them fall in June, not July. 8 of the 25 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Montana, see the Montana hail map and history.
Reports cluster nearest Geraldine -- 8 of the county's 25 hail days -- then Fort Benton (5), Highwood (4), The Knees (4) and Loma (4). Beyond those, NOAA names Floweree, Carter, Big Sandy and Square Butte on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Geraldine | 4 | 1.75″ |
| Fort Benton | 4 | 1.00″ |
| 9 SSE The Knees | 2 | 2.50″ |
| Highwood | 2 | 1.75″ |
| 2 W Floweree | 1 | 2.75″ |
The season runs June through August: 24 of the 25 hail days on record fall in those 3 months (96%). July is the single busiest month, with 11 of them (44%). That peak sits inside the window rather than at either end. 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 | 1 |
| June | 8 |
| July | 11 |
| August | 5 |
That day put 4 reports on the map, the biggest 2.5 inches near Highwood. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-06-15 | 2.50″ | 4 |
| 2024-08-21 | 1.00″ | 1 |
| 2024-08-18 | 1.00″ | 1 |
| 2024-06-21 | 2.50″ | 1 |
| 2022-07-06 | 1.25″ | 1 |
| 2021-06-09 | 2.00″ | 2 |
| 2020-07-07 | 1.00″ | 2 |
| 2019-07-14 | 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 2.75 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: Cascade County (44 hail days), Judith Basin County (33) and Hill County (20). Chouteau County sits in between.
Cascade County · Judith Basin County · Hill 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, Chouteau County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.