The most recent reported hail day was 2026-04-02, 120 days ago. Keokuk 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 2026-04-02 near Martinsburg.
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 2026-04-02, around Martinsburg. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Keokuk 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 23 separate hail days here since 2010 -- 1.4 a year over 17 years of record. They carry 32 reports in total: most hail days here are logged from a single spot. 5 of those 17 years produced none at all. The busiest single year was 2020, with 3 hail days. The last five years track the long-run rate, with 6 days since 2022.
Most hail here stays under 2 inches: only 1 of the 23 days on record passed it, 4%, the last on 2026-04-02. Those big days do not follow the county's usual calendar: most of them fall in April, not May. Golf-ball size is rarer still: 1.75 inches or more on 4 of the 23 days.
Across the whole of Iowa, see the Iowa hail map and history.
Reports cluster nearest Ollie -- 5 of the county's 23 hail days -- then Sigourney (4), Keswick (3), Webster (3) and Richland (3).
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 1 W Sigourney | 2 | 1.25″ |
| Ollie | 2 | 1.25″ |
| Richland | 2 | 1.00″ |
| 2 E Martinsburg | 1 | 3.00″ |
| Keswick | 1 | 1.75″ |
The season runs April through August: 19 of the 23 hail days on record fall in those 5 months (83%). May is the single busiest month, with 9 of them (39%). That peak sits inside the window rather than at either end. Hail has also been reported in February, March, September and October, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 1 |
| April | 6 |
| May | 9 |
| August | 4 |
| September | 1 |
| October | 1 |
That day put 3 reports on the map, the biggest 3 inches near Martinsburg. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-02 | 3.00″ | 3 |
| 2024-10-03 | 1.00″ | 2 |
| 2024-08-15 | 1.25″ | 1 |
| 2023-05-07 | 1.25″ | 2 |
| 2023-03-31 | 1.00″ | 1 |
| 2022-08-19 | 1.00″ | 1 |
| 2021-08-26 | 1.75″ | 3 |
| 2020-05-23 | 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 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: Jefferson County (17 hail days), Wapello County (18) and Mahaska County (15). Keokuk County takes more hail than any of them.
Jefferson County · Wapello County · Mahaska County
Back to the Iowa hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Keokuk County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.