The most recent reported hail day was 2026-04-17, 105 days ago. Monroe County is hit in most years. 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 2011-06-05 near Fort Mc Coy.
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 Tomah. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Monroe 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 25 separate hail days here since 2010 -- 1.5 a year over 17 years of record. Those days carry 51 separate reports between them, two or three on a typical one. 4 of those 17 years produced none at all. One year dominates the record: 2011 alone produced 5 of the 25 days. The last five years track the long-run rate, with 8 days since 2022.
Most hail here stays under 2 inches: only 2 of the 25 days on record passed it, 8%, the last on 2011-06-05. They land in the same month as everything else, April. Golf-ball size is rarer still: 1.75 inches or more on 3 of the 25 days.
Across the whole of Wisconsin, see the Wisconsin hail map and history.
Reports cluster nearest Sparta -- 11 of the county's 25 hail days -- then Warrens (6), Tomah (5), Kendall (3) and Fort Mc Coy (2). That one town is named on 44% of them. Beyond those, NOAA names Four Corners and Leon on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Sparta | 4 | 1.00″ |
| Warrens | 3 | 1.00″ |
| Fort Mc Coy | 2 | 2.50″ |
| Tomah | 2 | 2.50″ |
| 1 S Sparta | 2 | 1.00″ |
The season runs April through August: 24 of the 25 hail days on record fall in those 5 months (96%). April is the single busiest month, with 6 of them (24%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 6 |
| May | 6 |
| June | 3 |
| July | 3 |
| August | 6 |
| September | 1 |
That day put 2 reports on the map, the biggest 1 inch near Tomah. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-17 | 1.00″ | 2 |
| 2026-04-13 | 1.00″ | 4 |
| 2025-08-16 | 1.00″ | 1 |
| 2025-05-15 | 1.00″ | 2 |
| 2024-09-21 | 1.00″ | 1 |
| 2024-05-07 | 1.00″ | 1 |
| 2022-06-15 | 1.00″ | 1 |
| 2022-04-12 | 1.50″ | 2 |
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: Vernon County (19 hail days), La Crosse County (25) and Juneau County (18). Monroe County sits in between.
Vernon County · La Crosse County · Juneau 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, Monroe County, Wisconsin only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.