Plymouth County was hit as recently as 2026-05-17, 75 days ago. Plymouth County is hit in most years, and usually several times over. The largest stone on record here is 2.75 inches, a baseball and 2.8 times the National Weather Service's 1 inch severe criterion, reported on 2026-04-13 near Remsen.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Iowa. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-05-17, around Craig. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Plymouth 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 40 separate hail days here since 2010 -- 2.4 a year over 17 years of record. Those days carry 79 separate reports between them, two or three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2025, with 5 hail days. The last five years track the long-run rate, with 11 days since 2022.
8 of the 40 days reached 2 inches or more -- 20%, or about one hail day in 5, the last on 2026-04-13. Those big days do not follow the county's usual calendar: most of them fall in April, not June. 10 of the 40 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Iowa, see the Iowa hail map and history.
Reports cluster nearest Le Mars -- 8 of the county's 40 hail days -- then Remsen (8), Hinton (7), Kingsley (7) and Westfield (5). Beyond those, NOAA names Oyens, Merrill, Akron, Brunsville and Craig on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Hinton | 5 | 2.50″ |
| 1 SE Le Mars | 3 | 2.00″ |
| Brunsville | 3 | 1.00″ |
| Akron | 2 | 2.00″ |
| Oyens | 2 | 2.00″ |
The season runs April through August: 34 of the 40 hail days on record fall in those 5 months (85%). June is the single busiest month, with 12 of them (30%). 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 | 8 |
| May | 5 |
| June | 12 |
| July | 4 |
| August | 5 |
| September | 3 |
| October | 2 |
That day put 2 reports on the map, the biggest 1.75 inches near Craig. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-05-17 | 1.75″ | 2 |
| 2026-04-13 | 2.75″ | 3 |
| 2025-09-21 | 2.00″ | 1 |
| 2025-06-14 | 1.25″ | 3 |
| 2025-06-11 | 1.00″ | 1 |
| 2025-04-28 | 1.25″ | 3 |
| 2025-04-17 | 2.50″ | 4 |
| 2024-04-30 | 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 2.75 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: Sioux County (39 hail days), Woodbury County (36), Cherokee County (29) and Union County, South Dakota (27). Plymouth County takes more hail than any of them.
Sioux County · Woodbury County · Cherokee County · Union County, South Dakota
Back to the Iowa hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Plymouth County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.