Hail history for Mercer County, Pennsylvania
Every NOAA hail report filed in Mercer County since 1956, with preliminary National Weather Service reports to November 3, 2026.
Readout · Mercer County
- Last hail
- Sep 2, 2026
- 0.75 in, penny size · preliminary
- Hail days, last 5 years
- 8
- since Nov 3, 2021 · 27 reports
- Largest ever
- 2.75 in
- baseball · May 28, 2019
161 reports on 81 days since 1956 · #8 of 68 Pennsylvania counties
Hail map · Mercer County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Mercer County is from September 2, 2026. A local roofer can check and document it at no cost.
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What the record says about Mercer County
The latest hail report in Mercer County is from September 2, 2026, 0.75 in (penny size). Since November 3, 2021 there have been 8 separate hail days; the biggest stones in that time were 2.50 in on June 16, 2022.
Over the 20 years 2006–2025, Mercer County logged 105 reports on 42 hail days, about 5.3 reports a year. That is 2.6 times the median Pennsylvania county (2.0 a year) and ranks #8 of 68 Pennsylvania counties for all-time reports. Mercer County holds 3% of all 5,542 hail reports in Pennsylvania.
3% of reports with a size were 2 inches (hen egg) or larger, against 3% for the median Pennsylvania county. The largest hail on record here is 2.75 in (baseball) on May 28, 2019 near Sandy Lake.
Reports were down 48% in 2016–2025 (36) compared with 2006–2015 (69). The busiest year was 2011, with 25 reports on 7 days. Hail here peaks in May (35% of reports); 70% fall between April and June.
Reports a year 2006–2025 average
- Mercer County 5.3
- Median Pennsylvania county 2.0
Hail days 2006–2025
- Mercer County 42
- Median Pennsylvania county 22.5
Share 2 in or larger of sized reports
- Mercer County 3%
- Median Pennsylvania county 3%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 9 | 1 | 10 | ||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 4 | 3 | 7 | ||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 2 | 7 | 9 | ||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 3 | 1 | 8 | 1 | 3 | 16 | |||||||
| 2018 | 2 | 1 | 3 | ||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Sep 2, 2026 | 1 | 0.75 in | View |
| Apr 15, 2026 | 9 | 1.75 in | — |
| May 2, 2025 | 1 | 1.25 in | — |
| Oct 6, 2024 | 3 | 1.00 in | — |
| Apr 14, 2024 | 4 | 1.00 in | — |
| Jun 16, 2022 | 7 | 2.50 in | — |
| May 21, 2022 | 1 | 0.75 in | — |
| May 1, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 28, 2019 | 2.75 inbaseball | Sandy Lake | — | 13:39 local · NCEI |
| Jun 16, 2022 | 2.50 intennis ball | 1.73 SE Transfer | $30K | 14:42 local · NCEI |
| May 28, 2019 | 2.50 intennis ball | 1.25 WNW Sandy Lake | — | 13:41 local · NCEI |
| May 28, 2019 | 2.25 inhen egg | 0.86 NE Stoneboro | — | 13:48 local · NCEI |
| Apr 15, 2026 | 1.75 ingolf ball | 2.79 N Orangeville | — | 17:14 local · NCEI |
Size of every report
- Under 1 in 67 42%
- 1–2 in 90 56%
- 2 in + 4 2%
Most recent reports
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Sep 2, 2026 | 0.75 inpenny | 2 W New Lebanon | — | 21:29 UTC · NWS prelim. |
| Apr 15, 2026 | 1.00 inquarter | 1.81 NW Sandy Lake | — | 17:45 local · NCEI |
| Apr 15, 2026 | 1.00 inquarter | 0.57 ESE New Vernon | — | 17:43 local · NCEI |
| Apr 15, 2026 | 1.25 inhalf dollar | 1.43 SE Clarks Mills | — | 17:40 local · NCEI |
| Apr 15, 2026 | 1.50 inping pong ball | 1.39 N Fairview | — | 17:35 local · NCEI |
| Apr 15, 2026 | 1.00 inquarter | 1.49 SSE Hadley | — | 17:34 local · NCEI |
| Apr 15, 2026 | 1.00 inquarter | 0.47 NNW Henlein | — | 17:22 local · NCEI |
| Apr 15, 2026 | 1.25 inhalf dollar | 1.15 SE Maysville | — | 17:20 local · NCEI |
| Apr 15, 2026 | 1.75 ingolf ball | 2.79 N Orangeville | — | 17:14 local · NCEI |
| Apr 15, 2026 | 1.50 inping pong ball | 3.69 WSW Maysville | — | 17:13 local · NCEI |
| May 2, 2025 | 1.25 inhalf dollar | 0.52 E Jamestown | — | 15:08 local · NCEI |
| Oct 6, 2024 | 1.00 inquarter | 0.69 S Mercer | $1K | 17:15 local · NCEI |
Cities and towns in Mercer County
| Place | Reports | Largest |
|---|---|---|
| Hermitage | 20 | 1.75 in |
| Mercer | 18 | 1.75 in |
| Greenville | 17 | 1.75 in |
| Grove City | 17 | 1.25 in |
| Sandy Lake | 11 | 2.75 in |
| Sharon | 10 | 1.75 in |
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Reynolds Heights | 9 | 6 | Apr 14, 2024 |
| Stoneboro | 9 | 7 | Aug 15, 2019 |
| Farrell | 6 | 3 | May 7, 2012 |
| Fredonia | 5 | 5 | Apr 15, 2026 |
| Jamestown | 5 | 5 | May 2, 2025 |
| Sheakleyville | 5 | 5 | Apr 15, 2026 |
| Jackson Center | 4 | 4 | Apr 14, 2024 |
| New Lebanon | 4 | 4 | Sep 2, 2026 |
| West Middlesex | 4 | 4 | Apr 14, 2024 |
| Clark | 3 | 2 | Jun 16, 2022 |
| Lake Latonka | 3 | 3 | Oct 6, 2024 |
Questions about hail in Mercer County
How often does it hail in Mercer County, Pennsylvania?
161 hail reports have been logged in Mercer County since 1956. Over the 20 years 2006–2025 that averages 5.3 reports a year. That ranks #8 of 68 Pennsylvania counties by number of reports.
When is hail season in Mercer County?
Most reports come in May, April, June. May alone accounts for 35% of all reports.
What is the largest hail recorded in Mercer County?
2.75 in (baseball size) on May 28, 2019 near Sandy Lake. 2% of reports here were 2 inches or larger.
When did it last hail in Mercer County?
The most recent report in this data is from September 2, 2026 (0.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Mercer County had in the last five years?
8 separate days with hail reports since November 3, 2021, adding up to 27 reports. The most recent was September 2, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.