Grundy County was hit as recently as 2026-05-16, 76 days ago. Grundy County is hit in most years. The largest stone on record here is 4.25 inches and 4.2 times the National Weather Service's 1 inch severe criterion, reported on 2014-05-10 near Trenton.
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 2026-05-16, around Trenton. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Grundy 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 33 separate hail days here since 2010 -- 1.9 a year over 17 years of record. Those days carry 92 separate reports between them, two or three on a typical one. 3 of those 17 years produced none at all. The busiest single year was 2019, with 6 hail days. The last five years track the long-run rate, with 9 days since 2022.
5 of the 33 days reached 2 inches or more -- 15%, or about one hail day in 7, the last on 2026-05-16. They land in the same month as everything else, May. Golf-ball size is rarer still: 1.75 inches or more on 6 of the 33 days.
Across the whole of Missouri, see the Missouri hail map and history.
Reports cluster nearest Trenton -- 20 of the county's 33 hail days -- then Spickard (7), Laredo (6), Tindall (5) and Galt (4). That one town is named on 61% of them. Beyond those, NOAA names Jamesport, Sw Trenton, Brimson and Edinburg on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Trenton | 9 | 2.50″ |
| Spickard | 5 | 1.00″ |
| Laredo | 3 | 2.50″ |
| 1 N Trenton | 3 | 1.50″ |
| 2 E Trenton | 2 | 2.75″ |
The season runs March through June: 27 of the 33 hail days on record fall in those 4 months (82%). May is the single busiest month, with 10 of them (30%). That peak sits inside the window rather than at either end. Hail has also been reported in July, August, September and December, outside that window. Reports span 8 of the 12 calendar months; the other 4 have never produced one.
| Month | Hail days |
|---|---|
| March | 3 |
| April | 5 |
| May | 10 |
| June | 9 |
| July | 1 |
| August | 3 |
| September | 1 |
| December | 1 |
That day put 33 reports on the map, the biggest 3 inches near Trenton. 3 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-05-16 | 3.00″ | 33 |
| 2026-04-17 | 1.00″ | 2 |
| 2026-04-15 | 1.25″ | 2 |
| 2024-05-23 | 1.00″ | 1 |
| 2024-04-27 | 1.00″ | 2 |
| 2023-08-11 | 1.00″ | 2 |
| 2023-05-06 | 4.00″ | 5 |
| 2023-03-31 | 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 4.25 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: Livingston County (20 hail days), Mercer County (14) and Daviess County (29). Grundy County takes more hail than any of them.
Livingston County · Mercer County · Daviess 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, Grundy County, Missouri only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.