The most recent reported hail day was 2026-04-13, 109 days ago. Martin County is hit in most years. The largest stone on record here is 1.5 inches, a ping-pong ball and 1.5 times the National Weather Service's 1 inch severe criterion, reported on 2024-05-20 near Sherburn.
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 2026-04-13, around Fairmont. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Martin County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
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. 3 of those 17 years produced none at all. The busiest single year was 2020, with 4 hail days. The last five years track the long-run rate, with 5 days since 2022.
No stone of 2 inches or more has ever been reported in Martin County: all 21 hail days on record topped out below that.
Across the whole of Minnesota, see the Minnesota hail map and history.
Reports cluster nearest Fairmont -- 8 of the county's 21 hail days -- then Truman (5), Sherburn (4), Welcome (4) and Trimont (3). Beyond those, NOAA names Granada on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Trimont | 2 | 1.25″ |
| Truman | 2 | 1.25″ |
| Welcome | 2 | 1.25″ |
| 3 Ssw Fairmont | 2 | 1.00″ |
| Fairmont | 2 | 1.00″ |
The season runs April through July: 17 of the 21 hail days on record fall in those 4 months (81%). May is the single busiest month, with 6 of them (29%). That peak sits inside the window rather than at either end. Hail has also been reported in August and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 5 |
| May | 6 |
| June | 5 |
| July | 1 |
| August | 2 |
| September | 2 |
That day put 1 report on the map, the biggest 1 inch near Fairmont. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-13 | 1.00″ | 1 |
| 2024-05-20 | 1.50″ | 2 |
| 2023-08-16 | 1.00″ | 2 |
| 2022-05-11 | 1.25″ | 1 |
| 2022-04-12 | 1.25″ | 4 |
| 2021-04-27 | 1.25″ | 2 |
| 2020-09-05 | 1.00″ | 1 |
| 2020-07-11 | 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 1.5 inches, which is the red 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: Watonwan County (14 hail days), Jackson County (26), Cottonwood County (25) and Emmet County, Iowa (16). Martin County sits in between.
Watonwan County · Jackson County · Cottonwood County · Emmet County, Iowa
Back to the Minnesota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Martin County, Minnesota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.