Richland County was hit as recently as 2026-06-27, 34 days ago. Richland County is hit in most years, and usually several times over. The largest stone on record here is 2 inches, a hen egg and twice the National Weather Service's 1 inch severe criterion, reported on 2021-06-10 near Sidney.
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 2026-06-27, around Brockton. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Richland 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 40 separate hail days here since 2010 -- 2.4 a year over 17 years of record. Those days carry 81 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 2010, with 7 hail days. The last five years have been quieter than the long run: 5 days since 2022, against 2.9 a year before that.
Most hail here stays under 2 inches: only 3 of the 40 days on record passed it, 8%, the last on 2021-06-10. They land in the same month as everything else, June. 18 of the 40 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 Sidney -- 15 of the county's 40 hail days -- then Culbertson (6), Fairview (6), Brockton (5) and Savage (5). Beyond those, NOAA names Sprole, Lambert, Enid, Nohly, Richey and Wooley on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Sidney | 6 | 2.00″ |
| 12 SSE Sprole | 4 | 1.75″ |
| Fairview | 4 | 1.75″ |
| 14 Sse Culbertson | 4 | 1.50″ |
| Lambert | 3 | 1.75″ |
The season runs June through August: 36 of the 40 hail days on record fall in those 3 months (90%). June is the single busiest month, with 15 of them (38%). 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 | 2 |
| June | 15 |
| July | 14 |
| August | 7 |
| September | 2 |
That day put 2 reports on the map, the biggest 1.75 inches near Brockton. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-27 | 1.75″ | 2 |
| 2026-06-06 | 1.25″ | 1 |
| 2025-08-07 | 1.00″ | 1 |
| 2024-05-17 | 1.25″ | 1 |
| 2023-07-30 | 1.00″ | 1 |
| 2021-07-08 | 1.75″ | 4 |
| 2021-06-10 | 2.00″ | 6 |
| 2021-06-08 | 2.00″ | 3 |
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 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, over the state line included: Roosevelt County (48 hail days), Dawson County (37), Wibaux County (28), McKenzie County, North Dakota (44) and Williams County, North Dakota (48). Richland County sits in between.
Roosevelt County · Dawson County · Wibaux County · McKenzie County, North Dakota · Williams County, North Dakota
Back to the Montana hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Richland County, Montana only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.