Cascade County, Montana Hail Map & History
Cascade County was hit as recently as 2026-09-13, 1 day ago. Cascade County is hit in most years, often more than once. The largest stone on record here is 3 inches, a teacup and 3 times the National Weather Service's 1 inch severe criterion, reported on 2022-07-07 near Sun River.
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 2026-09-13, around Monarch. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Cascade 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 ->How often it hails in Cascade County
NOAA's Storm Prediction Center has logged 45 separate hail days here since 2010 -- 2.6 a year over 17 years of record. Those days carry 132 separate reports between them, two or three on a typical one. 3 of those 17 years produced none at all. One year dominates the record: 2013 alone produced 9 of the 45 days. The last five years track the long-run rate, with 11 days since 2022.
5 of the 45 days reached 2 inches or more -- 11%, or about one hail day in 9, the last on 2022-07-07. Those big days do not follow the county's usual calendar: most of them fall in August, not June. 16 of the 45 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Montana, see the Montana hail map and history.
Hardest-hit places in Cascade County
Reports cluster nearest Great Falls -- 12 of the county's 45 hail days -- then Monarch (8), Vaughn (6), Ulm (6) and Malmstrom Afb (6). Beyond those, NOAA names Black Eagle, Sun Prairie, Belt, Stockett, Sun River, Fort Shaw, Cascade, Highwood and Floweree on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Great Falls | 6 | 1.75″ |
| Belt | 3 | 1.75″ |
| 2 WNW Great Falls | 3 | 1.00″ |
| 3 NW Sun River | 2 | 3.00″ |
| 1 WNW Black Eagle | 2 | 2.00″ |
When it hails in Cascade County
The season runs May through July: 36 of the 45 hail days on record fall in those 3 months (80%). June is the single busiest month, with 19 of them (42%). That peak sits inside the window rather than at either end. Hail has also been reported in August and September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 6 |
| June | 19 |
| July | 11 |
| August | 5 |
| September | 4 |
Recent Cascade County hail days
That day put 1 report on the map, the biggest 1 inch near Monarch. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-09-13 | 1.00″ | 1 |
| 2025-07-31 | 1.25″ | 2 |
| 2025-07-29 | 1.00″ | 1 |
| 2025-07-28 | 1.00″ | 1 |
| 2025-06-15 | 1.50″ | 11 |
| 2024-06-21 | 1.50″ | 1 |
| 2023-07-30 | 1.25″ | 4 |
| 2023-07-29 | 1.75″ | 1 |
How to read the Cascade County map
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 3 inches, which is the purple band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own: Chouteau County (25 hail days), Teton County (22) and Lewis and Clark County (23). Cascade County takes more hail than any of them.
Chouteau County · Teton County · Lewis and Clark County
Back to the Montana hail map or the U.S. hail map.
FAQ
How often does it hail in Cascade County, Montana?
When is hail season in Cascade County?
How big does hail get in Cascade County?
When was the last hail in Cascade County?
Is the Cascade County hail map free?
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Cascade County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.