Teton County was hit as recently as 2026-07-17, 14 days ago. Teton 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 2022-07-07 near Bynum.
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 2026-07-17, around Augusta. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Teton 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 22 separate hail days here since 2010 -- 1.3 a year over 17 years of record. Those days carry 42 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 2019, with 3 hail days. The last five years track the long-run rate, with 6 days since 2022.
Most hail here stays under 2 inches: only 2 of the 22 days on record passed it, 9%, the last on 2022-07-07. They land in the same month as everything else, June. Golf-ball size is rarer still: 1.75 inches or more on 4 of the 22 days.
Across the whole of Montana, see the Montana hail map and history.
Reports cluster nearest Choteau -- 6 of the county's 22 hail days -- then Bynum (5), Fairfield (4), Dutton (3) and Power (3). Beyond those, NOAA names Brady on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 6 Ese Bynum | 2 | 1.75″ |
| 8 ENE Choteau | 2 | 1.75″ |
| 1 NW Choteau | 2 | 1.00″ |
| Choteau | 2 | 1.00″ |
| 3 Se Bynum | 1 | 2.75″ |
The season runs June through August: 20 of the 22 hail days on record fall in those 3 months (91%). June is the single busiest month, with 11 of them (50%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in May and September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 1 |
| June | 11 |
| July | 5 |
| August | 4 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Augusta. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-17 | 1.00″ | 1 |
| 2026-06-12 | 1.00″ | 1 |
| 2024-08-19 | 1.00″ | 1 |
| 2023-06-23 | 1.00″ | 2 |
| 2022-08-25 | 1.00″ | 1 |
| 2022-07-07 | 2.75″ | 8 |
| 2020-08-20 | 1.75″ | 2 |
| 2020-06-24 | 1.50″ | 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), Toole County (14) and Glacier County (27). Teton County sits in between.
Cascade County · Toole County · Glacier 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, Teton County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.