Olmsted County was hit as recently as 2026-06-10, 51 days ago. Olmsted County is hit in most years. 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 2018-05-29 near Rock Dell.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Minnesota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-06-10, around Rochester. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Olmsted 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 27 separate hail days here since 2010 -- 1.6 a year over 17 years of record. Those days carry 75 separate reports between them, two or three on a typical one. 4 of those 17 years produced none at all. The busiest single year was 2022, with 4 hail days. The last five years have run hotter than the long-run rate: 12 days since 2022, against 1.2 a year before that.
Most hail here stays under 2 inches: only 1 of the 27 days on record passed it, 4%, the last on 2018-05-29. They land in the same month as everything else, May. Golf-ball size is rarer still: 1.75 inches or more on 5 of the 27 days.
Across the whole of Minnesota, see the Minnesota hail map and history.
Reports cluster nearest Rochester -- 12 of the county's 27 hail days -- then Chester (4), Oronoco (4), Douglas (4) and Byron (4). That one town is named on 44% of them. Beyond those, NOAA names Stewartville, Genoa, Rock Dell, Eyota and Predmore on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Rochester | 3 | 1.00″ |
| Chester | 2 | 1.75″ |
| Rock Dell | 2 | 1.75″ |
| 4 NE Rochester | 2 | 1.50″ |
| 2 WNW Oronoco | 2 | 1.25″ |
The season runs May through August: 23 of the 27 hail days on record fall in those 4 months (85%). May is the single busiest month, with 9 of them (33%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in April, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| April | 4 |
| May | 9 |
| June | 6 |
| July | 3 |
| August | 5 |
That day put 2 reports on the map, the biggest 1.25 inches near Rochester. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-10 | 1.25″ | 2 |
| 2026-04-17 | 1.75″ | 4 |
| 2025-08-27 | 1.00″ | 1 |
| 2025-05-15 | 1.00″ | 1 |
| 2025-04-28 | 1.00″ | 1 |
| 2024-05-20 | 1.25″ | 1 |
| 2023-08-11 | 1.00″ | 1 |
| 2023-07-22 | 1.50″ | 5 |
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: Dodge County (23 hail days), Wabasha County (17) and Goodhue County (23). Olmsted County takes more hail than any of them.
Dodge County · Wabasha County · Goodhue County
Back to the Minnesota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Olmsted County, Minnesota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.