The most recent reported hail day was 2026-04-17, 105 days ago. DeKalb County is hit in most years. 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 2012-05-06 near Stewartsville.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Missouri. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-04-17, around Union Star. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls DeKalb 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 17 separate hail days here since 2010 -- 1.0 a year over 17 years of record. Those days carry 34 separate reports between them, two or three on a typical one. 5 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 6 days since 2022.
2 of the 17 days reached 2 inches or more -- 12%, or about one hail day in 8, the last on 2019-05-14. Those big days do not follow the county's usual calendar: most of them fall in May, not April. Golf-ball size is rarer still: 1.75 inches or more on 4 of the 17 days.
Across the whole of Missouri, see the Missouri hail map and history.
Reports cluster nearest Maysville -- 10 of the county's 17 hail days -- then Stewartsville (4), Cameron (4) and Osborn (2). That one town is named on 59% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Maysville | 6 | 1.75″ |
| Stewartsville | 3 | 2.75″ |
| 1 S Maysville | 3 | 2.50″ |
| 2 Nw Cameron | 1 | 2.50″ |
| 1 N Cameron | 1 | 1.75″ |
The season runs March through June: 14 of the 17 hail days on record fall in those 4 months (82%). April is the single busiest month, with 6 of them (35%). That peak sits inside the window rather than at either end. Hail has also been reported in July, August and September, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| March | 1 |
| April | 6 |
| May | 4 |
| June | 3 |
| July | 1 |
| August | 1 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Union Star. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-17 | 1.00″ | 1 |
| 2026-04-15 | 1.50″ | 6 |
| 2024-08-15 | 1.00″ | 1 |
| 2023-06-17 | 1.75″ | 1 |
| 2022-06-11 | 1.00″ | 1 |
| 2022-04-23 | 1.00″ | 1 |
| 2021-09-17 | 1.00″ | 1 |
| 2020-04-11 | 1.75″ | 2 |
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: Clinton County (23 hail days), Daviess County (29) and Caldwell County (18). Every one of them takes more hail than DeKalb County.
Clinton County · Daviess County · Caldwell County
Back to the Missouri hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, DeKalb County, Missouri only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.