Sumner County was hit as recently as 2026-07-09, 22 days ago. Sumner County is hit in most years, often more than once. The largest stone on record here is 3.5 inches and 3.5 times the National Weather Service's 1 inch severe criterion, reported on 2026-04-23 near Mayfield.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Kansas. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-09, around Belle Plaine. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Sumner 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 56 separate hail days here since 2010 -- 3.3 a year over 17 years of record. Those days carry 112 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 2016, with 9 hail days. The last five years track the long-run rate, with 18 days since 2022.
10 of the 56 days reached 2 inches or more -- 18%, or about one hail day in 6, the last on 2026-07-04. Those big days do not follow the county's usual calendar: most of them fall in April, not May. 22 of the 56 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Kansas, see the Kansas hail map and history.
Reports cluster nearest Wellington -- 15 of the county's 56 hail days -- then Caldwell (14), Conway Springs (13), Mayfield (7) and Belle Plaine (7). Beyond those, NOAA names Geuda Springs, Argonia, Perth, Milan, Oxford, South Haven, Norwich and Nw Mayfield on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Wellington | 8 | 2.50″ |
| Conway Springs | 8 | 1.75″ |
| Caldwell | 7 | 1.75″ |
| Argonia | 4 | 1.00″ |
| 1 S Perth | 3 | 1.75″ |
The season runs April through August: 49 of the 56 hail days on record fall in those 5 months (88%). May is the single busiest month, with 18 of them (32%). That peak sits inside the window rather than at either end. Hail has also been reported in March, September and October, outside that window. Reports span 8 of the 12 calendar months; the other 4 have never produced one.
| Month | Hail days |
|---|---|
| March | 3 |
| April | 7 |
| May | 18 |
| June | 9 |
| July | 10 |
| August | 5 |
| September | 2 |
| October | 2 |
That day put 1 report on the map, the biggest 1.75 inches near Belle Plaine. 6 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-09 | 1.75″ | 1 |
| 2026-07-04 | 2.25″ | 3 |
| 2026-05-18 | 1.75″ | 5 |
| 2026-04-23 | 3.50″ | 4 |
| 2026-04-17 | 1.25″ | 2 |
| 2026-03-10 | 1.00″ | 1 |
| 2025-07-18 | 1.75″ | 1 |
| 2025-07-11 | 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 3.5 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: Cowley County (63 hail days), Harper County (32) and Sedgwick County (114). Sumner County sits in between.
Cowley County · Harper County · Sedgwick County
Back to the Kansas hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Sumner County, Kansas only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.