The most recent reported hail day was 2025-05-04 -- 1 year ago, with nothing reported since. Armstrong County is hit in about half the years on record. 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 2025-05-04 near Girty.
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 2025-05-04, around Girty. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Armstrong County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
See call-center options ->NOAA's Storm Prediction Center has logged 13 separate hail days here since 2010 -- 0.8 a year over 17 years of record. Those days carry 39 separate reports between them, better than three on a typical one. 8 of those 17 years produced none at all. The busiest single year was 2025, with 2 hail days. The last five years track the long-run rate, with 4 days since 2022.
No stone of 2 inches or more has ever been reported in Armstrong County: all 13 hail days on record topped out below that. 5 of the 13 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Pennsylvania, see the Pennsylvania hail map and history.
Reports cluster nearest Elderton -- 3 of the county's 13 hail days -- then Templeton (3).
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Templeton | 2 | 1.25″ |
| 1 Ese Shadyside Village | 1 | 1.75″ |
| 1 S New Bethlehem | 1 | 1.75″ |
| 1 SSE Girty | 1 | 1.75″ |
| 2 S Kittanning | 1 | 1.75″ |
The season runs April through August: 11 of the 13 hail days on record fall in those 5 months (85%). May is the single busiest month, with 4 of them (31%). That peak sits inside the window rather than at either end. Hail has also been reported in March, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 2 |
| May | 4 |
| July | 2 |
| August | 3 |
That day put 1 report on the map, the biggest 1.75 inches near Girty. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-05-04 | 1.75″ | 1 |
| 2025-03-16 | 1.25″ | 1 |
| 2024-08-06 | 1.75″ | 8 |
| 2024-04-14 | 1.00″ | 2 |
| 2021-07-07 | 1.00″ | 1 |
| 2020-03-28 | 1.00″ | 2 |
| 2019-08-18 | 1.00″ | 1 |
| 2019-05-28 | 1.75″ | 9 |
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: Indiana County (20 hail days), Clarion County (16) and Butler County (24). Every one of them takes more hail than Armstrong County.
Indiana County · Clarion County · Butler 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, Armstrong County, Pennsylvania only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.