The most recent reported hail day was 2024-06-25 -- 2 years ago, with nothing reported since. Brown County is hit in about half the years on record. The largest stone on record here is 2 inches, a hen egg and twice the National Weather Service's 1 inch severe criterion, reported on 2023-03-31 near Versailles.
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 2024-06-25, around Mound Station. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Brown 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. They carry 22 reports in total: most hail days here are logged from a single spot. 9 of those 17 years produced none at all. The busiest single year was 2024, with 2 hail days. The last five years track the long-run rate, with 4 days since 2022.
2 of the 14 days reached 2 inches or more -- 14%, or about one hail day in 7, the last on 2023-03-31. Those big days do not follow the county's usual calendar: most of them fall in March, not June. 4 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 Mount Sterling -- 9 of the county's 14 hail days -- then Versailles (3) and Buckhorn (3). That one town is named on 64% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Mount Sterling | 2 | 2.00″ |
| 3 S Mount Sterling | 2 | 1.00″ |
| 1 W Mount Sterling | 1 | 2.00″ |
| 3 Nw Versailles | 1 | 2.00″ |
| 5 W Versailles | 1 | 2.00″ |
The season runs February through July: 12 of the 14 hail days on record fall in those 6 months (86%). June 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 October and December, 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 |
| May | 4 |
| June | 5 |
| July | 1 |
| October | 1 |
| December | 1 |
That day put 1 report on the map, the biggest 1 inch near Mound Station. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2024-06-25 | 1.00″ | 1 |
| 2024-06-13 | 1.00″ | 1 |
| 2023-05-07 | 1.75″ | 1 |
| 2023-03-31 | 2.00″ | 6 |
| 2021-07-09 | 2.00″ | 2 |
| 2021-05-03 | 1.50″ | 3 |
| 2018-12-01 | 1.00″ | 1 |
| 2017-06-17 | 1.75″ | 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 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: Pike County (16 hail days), Adams County (40) and Morgan County (24). Every one of them takes more hail than Brown County.
Pike County · Adams County · Morgan 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, Brown County, Illinois only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.