Hail history for Mercer, Pennsylvania
NOAA hail reports in and within about 5 km (3 miles) of Mercer since 1956, with preliminary reports to November 3, 2026.
Readout · Mercer
- Last hail
- Oct 6, 2024
- 1.00 in, quarter size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 1 report
- Largest ever
- 1.75 in
- golf ball · May 11, 1969
18 reports on 14 days since 1956 · #22 of 108 Pennsylvania places
Hail map · Mercer
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Mercer
The latest hail report in and around Mercer is from October 6, 2024, 1.00 in (quarter size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.00 in on October 6, 2024.
Over the 20 years 2006–2025, Mercer logged 12 reports on 8 hail days, about 0.6 reports a year. That is 33% more than the median Pennsylvania town on this site (0.5 a year) and ranks #22 of 108 Pennsylvania cities and towns on this site for all-time reports. Mercer accounts for 11% of the 161 reports filed in Mercer County.
0% of reports with a size were 2 inches (hen egg) or larger, against 0% for the median Pennsylvania town on this site. The largest hail on record here is 1.75 in (golf ball) on May 11, 1969.
Reports were down 80% in 2016–2025 (2) compared with 2006–2015 (10). The busiest year was 2011, with 5 reports on 2 days. Hail here peaks in August (33% of reports); 44% fall between April and June.
Reports a year 2006–2025 average
- Mercer 0.6
- Mercer County 5.3
- Median Pennsylvania town on this site 0.5
Hail days 2006–2025
- Mercer 8
- Mercer County 42
- Median Pennsylvania town on this site 6
Share 2 in or larger of sized reports
- Mercer 0%
- Mercer County 3%
- Median Pennsylvania town on this site 0%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Oct 6, 2024 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| May 11, 1969 | 1.75 ingolf ball | — | Mercer | — | 12:00 local · NCEI |
| Jun 21, 1956 | 1.50 inping pong ball | — | Mercer | — | 15:00 local · NCEI |
| May 7, 2010 | 1.25 inhalf dollar | 0.52 W Mercer | Mercer | — | 22:58 local · NCEI |
| Oct 6, 2024 | 1.00 inquarter | 0.69 S Mercer | Mercer | $1K | 17:15 local · NCEI |
| Aug 15, 2019 | 1.00 inquarter | 1.73 NW Milburn | Mercer | — | 13:07 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 6 33%
- 1–2 in 12 67%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Oct 6, 2024 | 1.00 inquarter | 0.69 S Mercer | Mercer | $1K | 17:15 local · NCEI |
| Aug 15, 2019 | 1.00 inquarter | 1.73 NW Milburn | Mercer | — | 13:07 local · NCEI |
| May 21, 2014 | 0.75 inpenny | 0.52 W Mercer | Mercer | — | 23:22 local · NCEI |
| Apr 10, 2013 | 0.88 innickel | 0.52 W Mercer | Mercer | — | 14:00 local · NCEI |
| Jul 4, 2012 | 1.00 inquarter | 1.48 SSE Cool Spg | Mercer | — | 21:19 local · NCEI |
| Nov 14, 2011 | 1.00 inquarter | Mercer | Mercer | — | 19:54 local · NCEI |
| Nov 14, 2011 | 1.00 inquarter | Mercer | Mercer | — | 19:50 local · NCEI |
| Aug 19, 2011 | 1.00 inquarter | 3.32 SW Mercer | Mercer | — | 14:10 local · NCEI |
| Aug 19, 2011 | 1.00 inquarter | 1.25 WSW Mercer | Mercer | — | 12:16 local · NCEI |
| Aug 19, 2011 | 1.00 inquarter | Mercer | Mercer | — | 12:12 local · NCEI |
| May 7, 2010 | 1.25 inhalf dollar | 0.52 W Mercer | Mercer | — | 22:58 local · NCEI |
| May 7, 2010 | 1.00 inquarter | 0.52 W Mercer | Mercer | — | 22:52 local · NCEI |
Hail history near Mercer
- Grove City 15 km · 17
- New Wilmington 15 km · 12
- Hermitage 17 km · 20
- Sandy Lake 19 km · 11
- Pulaski 21 km · 10
- Sharon 22 km · 10
- Greenville 23 km · 17
- Slippery Rock 23 km · 12
Questions about hail in Mercer
How often does it hail in Mercer, Pennsylvania?
18 hail reports have been logged in and within about 5 km (3 miles) of Mercer since 1956. Over the 20 years 2006–2025 that averages 0.6 reports a year. That ranks #22 of 108 Pennsylvania places by number of reports.
When is hail season in Mercer?
Most reports come in August, May, April. August alone accounts for 33% of all reports.
What is the largest hail recorded in Mercer?
1.75 in (golf ball size) on May 11, 1969. 0% of reports here were 2 inches or larger.
When did it last hail in Mercer?
The most recent report in this data is from October 6, 2024 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Mercer had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was October 6, 2024.
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.