The most recent reported hail day was 2025-08-16, 349 days ago. Adams County is hit in about half the years on record. 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 2016-06-15 near Big Flats.
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 2025-08-16, around Big Spring. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Adams 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 21 separate hail days here since 2010 -- 1.2 a year over 17 years of record. They carry 37 reports in total: most hail days here are logged from a single spot. 7 of those 17 years produced none at all. The busiest single year was 2012, with 4 hail days. The last five years have been quieter than the long run: 4 days since 2022, against 1.4 a year before that.
Most hail here stays under 2 inches: only 1 of the 21 days on record passed it, 5%, the last on 2016-06-15. Those big days do not follow the county's usual calendar: most of them fall in June, not May. Golf-ball size is rarer still: 1.75 inches or more on 5 of the 21 days.
Across the whole of Wisconsin, see the Wisconsin hail map and history.
Reports cluster nearest Big Flats -- 8 of the county's 21 hail days -- then Adams (3), Arkdale (3), Brooks (3) and Friendship (3). Beyond those, NOAA names Monroe Center and Big Spring on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Big Flats | 7 | 1.75″ |
| Arkdale | 2 | 1.25″ |
| 4 Ssw Brooks | 2 | 1.00″ |
| Adams | 2 | 1.00″ |
| 4 S Big Flats | 1 | 2.00″ |
The season runs April through August: 17 of the 21 hail days on record fall in those 5 months (81%). May is the single busiest month, with 7 of them (33%). That peak sits inside the window rather than at either end. Hail has also been reported in March, September 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 | 3 |
| May | 7 |
| June | 1 |
| July | 1 |
| August | 5 |
| September | 2 |
| October | 1 |
That day put 1 report on the map, the biggest 1 inch near Big Spring. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-08-16 | 1.00″ | 1 |
| 2025-05-15 | 1.75″ | 3 |
| 2023-03-31 | 1.25″ | 1 |
| 2022-04-12 | 1.00″ | 1 |
| 2020-08-25 | 1.00″ | 1 |
| 2020-08-24 | 1.00″ | 1 |
| 2018-08-28 | 1.00″ | 1 |
| 2017-09-20 | 1.50″ | 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 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: Juneau County (18 hail days), Wood County (21) and Waushara County (15). Adams County sits in between.
Juneau County · Wood County · Waushara 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, Adams County, Wisconsin only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.