Chester County was hit as recently as 2026-06-22, 39 days ago. Chester County is hit in most years. The largest stone on record here is 1.75 inches, a golf ball and 1.8 times the National Weather Service's 1 inch severe criterion, reported on 2010-07-25 near Toughkenamon.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Pennsylvania. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-06-22, around Upper Uwchlan Twp. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Chester 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 19 separate hail days here since 2010 -- 1.1 a year over 17 years of record. They carry 30 reports in total: most hail days here are logged from a single spot. 5 of those 17 years produced none at all. The busiest single year was 2019, with 3 hail days. The last five years track the long-run rate, with 5 days since 2022.
No stone of 2 inches or more has ever been reported in Chester County: all 19 hail days on record topped out below that. Golf-ball size is rarer still: 1.75 inches or more on 1 of the 19 days.
Across the whole of Pennsylvania, see the Pennsylvania hail map and history.
Reports cluster nearest Coatesville -- 5 of the county's 19 hail days -- then West Chester (3), Upper Uwchlan Twp (3), Toughkenamon (2) and Exton (2). Beyond those, NOAA names Wagontown on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Coatesville | 5 | 1.00″ |
| West Chester | 2 | 1.50″ |
| Exton | 2 | 1.25″ |
| 2 S Toughkenamon | 1 | 1.75″ |
| West Goshen | 1 | 1.50″ |
The season runs May through August: 16 of the 19 hail days on record fall in those 4 months (84%). May is the single busiest month, with 5 of them (26%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in April and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 1 |
| May | 5 |
| June | 5 |
| July | 4 |
| August | 2 |
| September | 2 |
That day put 1 report on the map, the biggest 1 inch near Upper Uwchlan Twp. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-22 | 1.00″ | 1 |
| 2024-07-14 | 1.00″ | 1 |
| 2023-09-07 | 1.00″ | 1 |
| 2023-04-01 | 1.00″ | 1 |
| 2022-06-01 | 1.00″ | 2 |
| 2019-06-29 | 1.00″ | 2 |
| 2019-06-02 | 1.00″ | 1 |
| 2019-05-28 | 1.00″ | 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 1.75 inches, which is the red band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own: Montgomery County (23 hail days), Berks County (24) and Lancaster County (28). Every one of them takes more hail than Chester County.
Montgomery County · Berks County · Lancaster County
Back to the Pennsylvania hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Chester County, Pennsylvania only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.