The most recent reported hail day was 2026-04-17, 105 days ago. Iowa County is hit in about half the years on record. 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 2021-08-07 near Highland.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Wisconsin. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-04-17, around Dodgeville. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Iowa 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 18 separate hail days here since 2010 -- 1.1 a year over 17 years of record. Those days carry 33 separate reports between them, two or three on a typical one. 8 of those 17 years produced none at all. The busiest single year was 2025, with 3 hail days. The last five years have run hotter than the long-run rate: 11 days since 2022, against 0.6 a year before that.
4 of the 18 days reached 2 inches or more -- 22%, or about one hail day in 4, the last on 2026-04-14. They land in the same month as everything else, April. 6 of the 18 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Wisconsin, see the Wisconsin hail map and history.
Reports cluster nearest Dodgeville -- 6 of the county's 18 hail days -- then Mineral Point (4), Cobb (3), Highland (2) and Arena (2). Beyond those, NOAA names Barneveld and Hollandale on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Cobb | 2 | 1.75″ |
| Barneveld | 2 | 1.00″ |
| Dodgeville | 2 | 1.00″ |
| Mineral Point | 2 | 1.00″ |
| 3 Nnw Highland | 1 | 2.50″ |
The season runs April through September: 15 of the 18 hail days on record fall in those 6 months (83%). April is the single busiest month, with 5 of them (28%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in March and October, outside that window. Reports span 8 of the 12 calendar months; the other 4 have never produced one.
| Month | Hail days |
|---|---|
| March | 1 |
| April | 5 |
| May | 3 |
| June | 1 |
| July | 2 |
| August | 1 |
| September | 3 |
| October | 2 |
That day put 1 report on the map, the biggest 1 inch near Dodgeville. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-17 | 1.00″ | 1 |
| 2026-04-14 | 2.00″ | 7 |
| 2025-09-22 | 2.00″ | 1 |
| 2025-04-18 | 1.50″ | 2 |
| 2025-04-17 | 1.25″ | 2 |
| 2024-09-21 | 1.00″ | 1 |
| 2024-05-21 | 1.75″ | 4 |
| 2024-05-07 | 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 2.5 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: Grant County (28 hail days), Richland County (15) and Sauk County (20). Iowa County sits in between.
Grant County · Richland County · Sauk County
Back to the Wisconsin hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Iowa County, Wisconsin only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.