Dunn County was hit as recently as 2026-07-05, 26 days ago. Dunn 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 2016-07-10 near Killdeer.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in North Dakota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-05, around Oakdale. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Dunn 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 41 separate hail days here since 2010 -- 2.4 a year over 17 years of record. Those days carry 78 separate reports between them, two or three on a typical one. No year since 2010 has gone by without at least one. The busiest single year was 2018, with 7 hail days. The last five years have been quieter than the long run: 7 days since 2022, against 2.8 a year before that.
7 of the 41 days reached 2 inches or more -- 17%, or about one hail day in 6, the last on 2024-07-12. They land in the same month as everything else, July. 19 of the 41 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of North Dakota, see the North Dakota hail map and history.
Reports cluster nearest Halliday -- 12 of the county's 41 hail days -- then Killdeer (9), Oakdale (8), Marshall (8) and Manning (5). Beyond those, NOAA names Twin Buttes, Hirschville, New Hradec and Dunn Center on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Halliday | 6 | 2.00″ |
| Killdeer | 4 | 3.00″ |
| 6 SW Killdeer | 3 | 1.75″ |
| Manning | 2 | 2.75″ |
| 2 Ne Halliday | 2 | 1.75″ |
The season runs June through August: 37 of the 41 hail days on record fall in those 3 months (90%). July is the single busiest month, with 17 of them (41%). That peak sits inside the window rather than at either end. 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 | 11 |
| July | 17 |
| August | 9 |
| September | 2 |
That day put 1 report on the map, the biggest 1 inch near Oakdale. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-05 | 1.00″ | 1 |
| 2025-07-26 | 1.75″ | 1 |
| 2024-07-12 | 2.75″ | 4 |
| 2023-08-30 | 1.25″ | 1 |
| 2023-08-01 | 1.50″ | 4 |
| 2023-07-29 | 1.75″ | 3 |
| 2022-06-20 | 1.00″ | 2 |
| 2021-07-08 | 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 3 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: Stark County (51 hail days), Billings County (23) and Mercer County (33). Dunn County sits in between.
Stark County · Billings County · Mercer County
Back to the North Dakota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Dunn County, North Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.