La Salle County, Illinois Hail Map & History
La Salle County was hit as recently as 2026-08-21, 24 days ago. La Salle 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 2017-02-28 near Ottawa.
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 2026-08-21, around Mendota. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls La Salle 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 La Salle County
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 63 separate reports between them, two or three on a typical one. 4 of those 17 years produced none at all. The busiest single year was 2026, with 4 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 2023-04-19. They land in the same month as everything else, April. Golf-ball size is rarer still: 1.75 inches or more on 6 of the 33 days.
Across the whole of Illinois, see the Illinois hail map and history.
Hardest-hit places in La Salle County
Reports cluster nearest Mendota -- 6 of the county's 33 hail days -- then Ottawa (5), Peru (5), Marseilles (4) and Earlville (4). Beyond those, NOAA names Sheridan, La Salle, Leland, Troy Grove, Lostant, Oglesby, Streator and Utica on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Marseilles | 4 | 2.75″ |
| Ottawa | 4 | 2.75″ |
| Earlville | 3 | 2.00″ |
| Sheridan | 3 | 1.25″ |
| Leland | 2 | 2.50″ |
When it hails in La Salle County
The season runs March through August: 27 of the 33 hail days on record fall in those 6 months (82%). April is the single busiest month, with 7 of them (21%). That peak sits inside the window rather than at either end. Hail has also been reported in February, September and November, outside that window. January, October and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 5 |
| April | 7 |
| May | 7 |
| June | 2 |
| July | 3 |
| August | 3 |
| September | 3 |
| November | 2 |
Recent La Salle County hail days
That day put 1 report on the map, the biggest 1.5 inches near Mendota. 4 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-08-21 | 1.50″ | 1 |
| 2026-04-13 | 1.00″ | 1 |
| 2026-04-02 | 1.00″ | 1 |
| 2026-03-10 | 1.00″ | 1 |
| 2025-03-19 | 1.00″ | 1 |
| 2023-05-07 | 1.00″ | 1 |
| 2023-04-19 | 2.00″ | 7 |
| 2023-04-04 | 2.50″ | 9 |
How to read the La Salle 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. 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.
Nearby counties
The nearest counties with a page of their own: Bureau County (30 hail days), Lee County (18) and Grundy County (15). La Salle County takes more hail than any of them.
Bureau County · Lee County · Grundy County
Back to the Illinois hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, La Salle County, Illinois only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.