St. Croix County was hit as recently as 2026-06-19, 42 days ago. St. Croix County is hit in most years. 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 2022-09-20 near River Falls.
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 2026-06-19, around Hudson. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls St. Croix 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 29 separate hail days here since 2010 -- 1.7 a year over 17 years of record. Those days carry 68 separate reports between them, two or three on a typical one. 3 of those 17 years produced none at all. The busiest single year was 2023, with 5 hail days. The last five years have run hotter than the long-run rate: 15 days since 2022, against 1.2 a year before that.
3 of the 29 days reached 2 inches or more -- 10%, or about one hail day in 10, the last on 2022-09-20. Those big days do not follow the county's usual calendar: most of them fall in May, not July. Golf-ball size is rarer still: 1.75 inches or more on 6 of the 29 days.
Across the whole of Wisconsin, see the Wisconsin hail map and history.
Reports cluster nearest Hudson -- 9 of the county's 29 hail days -- then New Richmond (7), Hammond (6), Baldwin (5) and Deer Park (4). Beyond those, NOAA names River Falls, Roberts and Star Prairie on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| New Richmond | 7 | 1.75″ |
| 1 NW Baldwin | 2 | 1.75″ |
| 1 N Hudson | 2 | 1.25″ |
| 1 Nw River Falls | 1 | 3.00″ |
| 1 N River Falls | 1 | 2.75″ |
The season runs May through August: 24 of the 29 hail days on record fall in those 4 months (83%). July is the single busiest month, with 8 of them (28%). 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 | 7 |
| July | 8 |
| August | 2 |
| September | 5 |
That day put 1 report on the map, the biggest 1 inch near Hudson. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-19 | 1.00″ | 1 |
| 2025-09-21 | 1.00″ | 1 |
| 2025-07-03 | 1.25″ | 1 |
| 2025-06-30 | 1.00″ | 1 |
| 2025-06-19 | 1.75″ | 12 |
| 2024-06-12 | 1.00″ | 2 |
| 2023-08-11 | 1.00″ | 1 |
| 2023-07-24 | 1.75″ | 4 |
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, over the state line included: Pierce County (19 hail days), Polk County (17), Dunn County (23), Washington County, Minnesota (29) and Ramsey County, Minnesota (27). St. Croix County sits in between.
Pierce County · Polk County · Dunn County · Washington County, Minnesota · Ramsey County, Minnesota
Back to the Wisconsin hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, St. Croix County, Wisconsin only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.