Johnson County, Kansas Hail Map & History
Johnson County was hit as recently as 2026-09-15, 44 days ago. Johnson 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 2024-03-13 near Bonner Springs.
Hail size, inches
- 0.25 in, pea
- 0.75 in, penny
- 1 in, quarter
- 1.25 in, half dollar
- 1.5 in, ping pong ball
- 1.75 in, golf ball
- 2 in, hen egg
- 2.5 in, tennis ball
- 3 in and up, teacup
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 2026-09-15, around Edgerton. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Johnson 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 ->How often it hails in Johnson County
NOAA's Storm Prediction Center has logged 65 separate hail days here since 2010 -- 3.8 a year over 17 years of record. Those days carry 289 separate reports between them, better than three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2026, with 9 hail days. The last five years track the long-run rate, with 21 days since 2022.
10 of the 65 days reached 2 inches or more -- 15%, or about one hail day in 6, the last on 2026-09-15. They land in the same month as everything else, May. 26 of the 65 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Kansas, see the Kansas hail map and history.
Hardest-hit places in Johnson County
Reports cluster nearest Olathe -- 27 of the county's 65 hail days -- then Lenexa (14), Shawnee (12), De Soto (11) and Stanley (11). That one town is named on 42% of them. Beyond those, NOAA names Overland Park, Lake Quivira, Clare, Merriam, Stillwell, Bonner Springs, Edgerton, Gardner and Spring Hill on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Olathe | 11 | 1.75″ |
| De Soto | 8 | 1.75″ |
| Shawnee | 6 | 2.75″ |
| Overland Park | 5 | 1.75″ |
| 1 NW Olathe | 4 | 1.75″ |
When it hails in Johnson County
The season runs April through September: 56 of the 65 hail days on record fall in those 6 months (86%). May is the single busiest month, with 15 of them (23%). That peak sits inside the window rather than at either end. Hail has also been reported in March, October and December, outside that window. January, February and November are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| March | 7 |
| April | 12 |
| May | 15 |
| June | 10 |
| July | 5 |
| August | 4 |
| September | 10 |
| October | 1 |
| December | 1 |
Recent Johnson County hail days
That day put 3 reports on the map, the biggest 2 inches near Edgerton. 9 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-09-15 | 2.00″ | 3 |
| 2026-09-06 | 1.00″ | 2 |
| 2026-08-21 | 1.00″ | 1 |
| 2026-08-05 | 1.25″ | 1 |
| 2026-04-26 | 1.75″ | 13 |
| 2026-04-23 | 1.00″ | 1 |
| 2026-04-17 | 1.00″ | 1 |
| 2026-04-15 | 1.00″ | 5 |
How to read the Johnson County map
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Deep violet is about an inch, the violet grows lighter as the hail grows, and pale lilac to near-white is 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 3 inches, which is the pale lilac band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own, over the state line included: Wyandotte County (27 hail days), Leavenworth County (41), Miami County (26) and Jackson County, Missouri (53). Johnson County takes more hail than any of them.
Wyandotte County · Leavenworth County · Miami County · Jackson County, Missouri
Back to the Kansas hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Johnson County, Kansas only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.