Day County was hit as recently as 2026-07-07, 24 days ago. Day County is hit in most years, and usually several times over. The largest stone on record here is 2.5 inches, a tennis ball and 2.5 times the National Weather Service's 1 inch severe criterion, reported on 2021-08-28 near Waubay.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in South Dakota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-07, around Webster. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Day County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
See call-center options ->NOAA's Storm Prediction Center has logged 44 separate hail days here since 2010 -- 2.6 a year over 17 years of record. They carry 67 reports in total: most hail days here are logged from a single spot. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2025, with 4 hail days. The last five years track the long-run rate, with 12 days since 2022.
5 of the 44 days reached 2 inches or more -- 11%, or about one hail day in 9, the last on 2024-06-02. Those big days do not follow the county's usual calendar: most of them fall in August, not July. Golf-ball size is rarer still: 1.75 inches or more on 9 of the 44 days.
Across the whole of South Dakota, see the South Dakota hail map and history.
Reports cluster nearest Webster -- 11 of the county's 44 hail days -- then Pierpont (8), Bristol (7), Roslyn (6) and Waubay (5). Beyond those, NOAA names Andover, Lily, Wallace, Pickerel Lake Stat and Eden on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Bristol | 4 | 1.50″ |
| Pierpont | 3 | 1.50″ |
| Webster | 3 | 1.00″ |
| Andover | 2 | 1.75″ |
| 4 NNW Roslyn | 2 | 1.50″ |
The season runs May through August: 42 of the 44 hail days on record fall in those 4 months (95%). July is the single busiest month, with 13 of them (30%). That peak sits inside the window rather than at either end. Hail has also been reported in September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 7 |
| June | 9 |
| July | 13 |
| August | 13 |
| September | 2 |
That day put 1 report on the map, the biggest 1 inch near Webster. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-07 | 1.00″ | 1 |
| 2025-08-13 | 1.50″ | 1 |
| 2025-08-05 | 1.50″ | 1 |
| 2025-07-28 | 1.00″ | 1 |
| 2025-06-15 | 1.25″ | 2 |
| 2024-07-06 | 1.00″ | 2 |
| 2024-06-11 | 1.00″ | 1 |
| 2024-06-02 | 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 2.5 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: Marshall County (18 hail days), Roberts County (26) and Codington County (38). Day County takes more hail than any of them.
Marshall County · Roberts County · Codington County
Back to the South Dakota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Day County, South Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.