Fergus County, Montana Hail Map & History
Fergus County was hit as recently as 2026-09-06, 8 days ago. Fergus County is hit in most years, and usually several times over. 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 2026-09-06 near Hilger.
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 2026-09-06, around Hilger. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Fergus 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 ->How often it hails in Fergus County
NOAA's Storm Prediction Center has logged 49 separate hail days here since 2010 -- 2.9 a year over 17 years of record. Those days carry 115 separate reports between them, two or three on a typical one. 2 of those 17 years produced none at all. The busiest single year was 2018, with 6 hail days. The last five years track the long-run rate, with 12 days since 2022.
6 of the 49 days reached 2 inches or more -- 12%, or about one hail day in 8, the last on 2026-09-06. They land in the same month as everything else, June. 15 of the 49 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 Fergus County
Reports cluster nearest Lewistown -- 13 of the county's 49 hail days -- then Forestgrove (10), Grass Range (10), Coffee Creek (7) and Winifred (5). Beyond those, NOAA names Denton, Hilger, Moore, Roy, Danvers, Buffalo and Christina on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 3 S Lewistown | 4 | 2.50″ |
| Grass Range | 4 | 1.50″ |
| Lewistown | 4 | 1.25″ |
| 6 WSW Forestgrove | 3 | 2.50″ |
| 1 Sse Winifred | 3 | 1.75″ |
When it hails in Fergus County
The season runs June through August: 42 of the 49 hail days on record fall in those 3 months (86%). June is the single busiest month, with 18 of them (37%). 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 | 4 |
| June | 18 |
| July | 18 |
| August | 6 |
| September | 3 |
Recent Fergus County hail days
That day put 7 reports on the map, the biggest 3 inches near Hilger. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-09-06 | 3.00″ | 7 |
| 2026-07-05 | 1.50″ | 2 |
| 2025-08-07 | 1.00″ | 2 |
| 2025-08-01 | 2.00″ | 1 |
| 2025-07-28 | 2.50″ | 1 |
| 2025-06-15 | 2.50″ | 7 |
| 2025-06-14 | 1.75″ | 3 |
| 2024-06-21 | 1.00″ | 1 |
How to read the Fergus 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: Judith Basin County (35 hail days), Petroleum County (30) and Wheatland County (16). Fergus County takes more hail than any of them.
Judith Basin County · Petroleum County · Wheatland County
Back to the Montana hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Fergus County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.