The most recent reported hail day was 2026-03-30, 123 days ago. Kendall County is hit in about half the years on record. The largest stone on record here is 4.75 inches and 4.8 times the National Weather Service's 1 inch severe criterion, reported on 2015-06-10 near Minooka.
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 2026-03-30, around Yorkville. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Kendall 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 16 separate hail days here since 2010 -- 0.9 a year over 17 years of record. Those days carry 54 separate reports between them, better than three on a typical one. 8 of those 17 years produced none at all. One year dominates the record: 2023 alone produced 4 of the 16 days. The last five years have run hotter than the long-run rate: 7 days since 2022, against 0.8 a year before that.
3 of the 16 days reached 2 inches or more -- 19%, or about one hail day in 5, the last on 2023-04-04. Those big days do not follow the county's usual calendar: most of them fall in April, not June. More than half of every hail day on record here -- 8 of 16 -- reached golf-ball size, 1.75 inches or bigger.
Across the whole of Illinois, see the Illinois hail map and history.
Reports cluster nearest Oswego -- 6 of the county's 16 hail days -- then Yorkville (6), Minooka (4), Plano (4) and Boulder Hill (3). Beyond those, NOAA names Lisbon, Shorewood, Plattville and Plainfield on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Oswego | 4 | 2.00″ |
| Plano | 4 | 1.00″ |
| Boulder Hill | 3 | 2.75″ |
| Yorkville | 3 | 1.75″ |
| 3 Nw Oswego | 2 | 1.75″ |
The season runs March through June: 15 of the 16 hail days on record fall in those 4 months (94%). June is the single busiest month, with 5 of them (31%). That peak closes the window: the season builds all the way to its worst month and then stops. Hail has also been reported in August, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| March | 3 |
| April | 4 |
| May | 3 |
| June | 5 |
| August | 1 |
That day put 3 reports on the map, the biggest 1 inch near Yorkville. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-03-30 | 1.00″ | 3 |
| 2026-03-10 | 1.25″ | 6 |
| 2024-06-24 | 1.00″ | 2 |
| 2023-05-07 | 1.75″ | 1 |
| 2023-04-19 | 1.75″ | 6 |
| 2023-04-04 | 3.00″ | 18 |
| 2023-03-26 | 1.25″ | 1 |
| 2019-05-27 | 2.00″ | 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 4.75 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: Kane County (43 hail days), Will County (56) and Grundy County (14). Kendall County sits in between.
Kane County · Will County · Grundy 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, Kendall County, Illinois only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.