The most recent reported hail day was 2026-04-02, 120 days ago. Henry County is hit in most years, and usually several times over. 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 2023-04-20 near Orion.
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 2026-04-02, around Coal Valley. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Henry 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 37 separate hail days here since 2010 -- 2.2 a year over 17 years of record. Those days carry 83 separate reports between them, two or three on a typical one. 2 of those 17 years produced none at all. The busiest single year was 2024, with 5 hail days. The last five years have run hotter than the long-run rate: 16 days since 2022, against 1.8 a year before that.
Most hail here stays under 2 inches: only 2 of the 37 days on record passed it, 5%, the last on 2023-04-20. Those big days do not follow the county's usual calendar: most of them fall in February, not April. 10 of the 37 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 Galva -- 12 of the county's 37 hail days -- then Geneseo (5), Kewanee (5), Cambridge (5) and Orion (4). Beyond those, NOAA names Atkinson, Colona, Osco, Annawan, Osborn, Bishop Hill, Coal Valley, Morristown and Spring Hill on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Galva | 9 | 2.00″ |
| Kewanee | 5 | 1.75″ |
| Geneseo | 3 | 1.75″ |
| Orion | 3 | 1.75″ |
| Annawan | 2 | 1.75″ |
The season runs March through July: 30 of the 37 hail days on record fall in those 5 months (81%). April is the single busiest month, with 8 of them (22%). That peak sits inside the window rather than at either end. January and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| February | 2 |
| March | 4 |
| April | 8 |
| May | 8 |
| June | 7 |
| July | 3 |
| August | 2 |
| September | 1 |
| October | 1 |
| November | 1 |
That day put 1 report on the map, the biggest 1 inch near Coal Valley. 3 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-02 | 1.00″ | 1 |
| 2026-03-31 | 1.00″ | 1 |
| 2026-03-10 | 1.50″ | 5 |
| 2025-05-15 | 1.75″ | 3 |
| 2024-10-24 | 1.00″ | 1 |
| 2024-05-07 | 1.00″ | 1 |
| 2024-04-16 | 1.25″ | 5 |
| 2024-03-04 | 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, over the state line included: Rock Island County (24 hail days), Knox County (25), Mercer County (13) and Scott County, Iowa (31). Henry County takes more hail than any of them.
Rock Island County · Knox County · Mercer County · Scott County, Iowa
Back to the Illinois hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Henry County, Illinois only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.