Clay County was hit as recently as 2026-06-21, 40 days ago. Clay County is hit in most years. The largest stone on record here is 1.75 inches, a golf ball and 1.8 times the National Weather Service's 1 inch severe criterion, reported on 2018-06-11 near Clay City.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Illinois. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-06-21, around Xenia. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Clay 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 14 separate hail days here since 2010 -- 0.8 a year over 17 years of record. Those days carry 27 separate reports between them, two or three on a typical one. 6 of those 17 years produced none at all. The busiest single year was 2026, with 2 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 Clay County: all 14 hail days on record topped out below that. 5 of the 14 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Illinois, see the Illinois hail map and history.
Reports cluster nearest Clay City -- 5 of the county's 14 hail days -- then Xenia (4), Hord (2), Louisville (2) and Flora (2).
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Clay City | 3 | 1.75″ |
| 6 Sse Clay City | 2 | 1.50″ |
| 1 E Louisville | 1 | 1.75″ |
| 2 Nw Ingraham | 1 | 1.75″ |
| 4 S Clay City | 1 | 1.75″ |
The season runs March through June: 13 of the 14 hail days on record fall in those 4 months (93%). May is the single busiest month, with 5 of them (36%). That peak sits inside the window rather than at either end. Hail has also been reported in February, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 2 |
| April | 2 |
| May | 5 |
| June | 4 |
That day put 1 report on the map, the biggest 1 inch near Xenia. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-21 | 1.00″ | 1 |
| 2026-05-04 | 1.50″ | 3 |
| 2025-03-30 | 1.50″ | 3 |
| 2024-05-26 | 1.00″ | 1 |
| 2023-03-23 | 1.00″ | 1 |
| 2021-05-06 | 1.00″ | 1 |
| 2019-06-26 | 1.00″ | 1 |
| 2018-06-11 | 1.75″ | 3 |
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 1.75 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: Effingham County (15 hail days), Marion County (21) and Jefferson County (18). Every one of them takes more hail than Clay County.
Effingham County · Marion County · Jefferson County
Back to the Illinois hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Clay County, Illinois only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.