The most recent reported hail day was 2025-09-11, 323 days ago. Valley County is hit in most years, and usually several times over. 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 2024-07-12 near Larslan.
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 2025-09-11, around Richland. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Valley 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 63 separate hail days here since 2010 -- 3.7 a year over 17 years of record. Those days carry 160 separate reports between them, two or three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2016, with 7 hail days. The last five years have been quieter than the long run: 12 days since 2022, against 4.2 a year before that.
11 of the 63 days reached 2 inches or more -- 17%, or about one hail day in 6, the last on 2025-07-26. They land in the same month as everything else, July. 23 of the 63 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 Glasgow -- 12 of the county's 63 hail days -- then Lustre (12), Nashua (10), Frazer (8) and Larslan (6). Beyond those, NOAA names Opheim, Richland, Saco, Baylor, Fort Peck, Saint Marie, Port of Opheim, Tampico and Hinsdale on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Glasgow | 5 | 2.00″ |
| Frazer | 4 | 1.50″ |
| Fort Peck | 3 | 2.75″ |
| The Pines Recreation Ar | 3 | 1.75″ |
| 5 SSW Opheim | 3 | 1.50″ |
The season runs May through July: 56 of the 63 hail days on record fall in those 3 months (89%). July is the single busiest month, with 29 of them (46%). That peak closes the window: the season builds all the way to its worst month and then stops. 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 | 21 |
| July | 29 |
| August | 6 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Richland. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-09-11 | 1.00″ | 1 |
| 2025-07-26 | 2.75″ | 1 |
| 2025-06-26 | 1.00″ | 1 |
| 2025-06-15 | 1.25″ | 2 |
| 2024-08-23 | 2.50″ | 4 |
| 2024-07-12 | 4.00″ | 5 |
| 2023-07-31 | 1.00″ | 1 |
| 2023-07-30 | 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: Daniels County (25 hail days), McCone County (43) and Roosevelt County (48). Valley County takes more hail than any of them.
Daniels County · McCone County · Roosevelt 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, Valley County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.