Dewey County was hit as recently as 2026-07-04, 27 days ago. Dewey County is hit in most years, often more than once. The largest stone on record here is 2.75 inches, a baseball and 2.8 times the National Weather Service's 1 inch severe criterion, reported on 2016-10-06 near Seiling.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Oklahoma. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-04, around Seiling. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Dewey 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 35 separate hail days here since 2010 -- 2.1 a year over 17 years of record. They carry 60 reports in total: most hail days here are logged from a single spot. 3 of those 17 years produced none at all. The busiest single year was 2016, with 4 hail days. The last five years have been quieter than the long run: 7 days since 2022, against 2.3 a year before that.
Roof-killing hail is routine here: 9 of the 35 days reached 2 inches or more, 26% of them, the last on 2026-03-05. Those big days do not follow the county's usual calendar: most of them fall in May, not April. 17 of the 35 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Oklahoma, see the Oklahoma hail map and history.
Reports cluster nearest Seiling -- 10 of the county's 35 hail days -- then Vici (9), Oakwood (7), Leedey (6) and Taloga (6). Beyond those, NOAA names Camargo, Hucmac and Canton on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Seiling | 5 | 2.75″ |
| Vici | 4 | 1.75″ |
| Oakwood | 3 | 1.75″ |
| 7 Nne Leedey | 2 | 2.50″ |
| Leedey | 2 | 2.00″ |
The season runs April through July: 28 of the 35 hail days on record fall in those 4 months (80%). April is the single busiest month, with 11 of them (31%). That peak opens the window: the season starts at its worst and eases off from there. February, November and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| January | 1 |
| March | 1 |
| April | 11 |
| May | 11 |
| June | 4 |
| July | 2 |
| August | 1 |
| September | 2 |
| October | 2 |
That day put 1 report on the map, the biggest 1 inch near Seiling. 3 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-04 | 1.00″ | 1 |
| 2026-04-17 | 1.25″ | 1 |
| 2026-03-05 | 2.00″ | 1 |
| 2025-06-08 | 1.00″ | 1 |
| 2024-05-06 | 1.75″ | 4 |
| 2024-04-30 | 1.25″ | 1 |
| 2024-04-27 | 1.75″ | 2 |
| 2021-10-26 | 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 2.75 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: Custer County (53 hail days), Woodward County (49) and Blaine County (37). Every one of them takes more hail than Dewey County.
Custer County · Woodward County · Blaine County
Back to the Oklahoma hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Dewey County, Oklahoma only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.