Hail history for Knox County, Ohio
Every NOAA hail report filed in Knox County since 1961, with preliminary National Weather Service reports to November 3, 2026.
Readout · Knox County
- Last hail
- Mar 26, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 7 reports
- Largest ever
- 1.75 in
- golf ball · Aug 9, 2012
80 reports on 56 days since 1961 · #53 of 89 Ohio counties
Hail map · Knox 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 Knox County is from March 26, 2026. A local roofer can check and document it at no cost.
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What the record says about Knox County
The latest hail report in Knox County is from March 26, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 1.25 in on May 2, 2025.
Over the 20 years 2006–2025, Knox County logged 40 reports on 27 hail days, about 2.0 reports a year. That is 18% less than the median Ohio county (2.5 a year) and ranks #53 of 89 Ohio counties for all-time reports. Knox County holds 1% of all 9,190 hail reports in Ohio.
0% of reports with a size were 2 inches (hen egg) or larger, against 3% for the median Ohio county. The largest hail on record here is 1.75 in (golf ball) on August 9, 2012 near 1.74 SW Monroe Mills.
Reports were down 86% in 2016–2025 (5) compared with 2006–2015 (35). The busiest year was 2012, with 9 reports on 5 days. Hail here peaks in May (21% of reports); 57% fall between April and June.
Reports a year 2006–2025 average
- Knox County 2.0
- Median Ohio county 2.5
Hail days 2006–2025
- Knox County 27
- Median Ohio county 31
Share 2 in or larger of sized reports
- Knox County 0%
- Median Ohio county 3%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 4 | 4 | |||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 2 | 2 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Mar 26, 2026 | 1 | 1.00 in | — |
| Mar 22, 2026 | 3 | 1.00 in | — |
| May 2, 2025 | 1 | 1.25 in | — |
| Mar 30, 2024 | 2 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Aug 9, 2012 | 1.75 ingolf ball | 1.74 SW Monroe Mills | $18K | 19:58 local · NCEI |
| Mar 30, 2012 | 1.75 ingolf ball | 1 E Centerburg | $25K | 18:13 local · NCEI |
| Aug 28, 2004 | 1.75 ingolf ball | Centerburg | $50K | 16:45 local · NCEI |
| May 31, 2002 | 1.75 ingolf ball | Bladensburg | $25K | 16:50 local · NCEI |
| Jun 27, 1998 | 1.75 ingolf ball | Howard | — | 20:55 local · NCEI |
Size of every report
- Under 1 in 38 48%
- 1–2 in 41 52%
- 2 in + 0 0%
- No size 1
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Mar 26, 2026 | 1.00 inquarter | 0.89 NE North Liberty | 20:00 local · NCEI |
| Mar 22, 2026 | 1.00 inquarter | 0.51 SSW Mt Vernon | 19:35 local · NCEI |
| Mar 22, 2026 | 0.75 inpenny | 0.83 ENE South Mt Vernon | 19:34 local · NCEI |
| Mar 22, 2026 | 1.00 inquarter | 0.83 NE Mt Liberty | 19:28 local · NCEI |
| May 2, 2025 | 1.25 inhalf dollar | 1.36 NNE North Liberty | 13:41 local · NCEI |
| Mar 30, 2024 | 1.00 inquarter | 0.95 WNW Mt Vernon | 16:34 local · NCEI |
| Mar 30, 2024 | 0.88 innickel | 0.9 SE Mt Vernon | 16:24 local · NCEI |
| Jun 2, 2019 | 1.00 inquarter | 1.48 SSW Palmyra | 00:51 local · NCEI |
| Aug 19, 2017 | 1.00 inquarter | 2.45 SW Monroe Mills | 14:07 local · NCEI |
| May 28, 2014 | 0.88 innickel | Danville | 12:45 local · NCEI |
| May 28, 2014 | 1.00 inquarter | 7 E Gambier | 12:15 local · NCEI |
| May 14, 2014 | 1.00 inquarter | Howard | 13:25 local · NCEI |
Cities and towns in Knox County
| Place | Reports | Largest |
|---|---|---|
| Mount Vernon | 32 | 1.75 in |
| Fredericktown | 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 |
|---|---|---|---|
| Howard | 7 | 7 | May 14, 2014 |
| Centerburg | 5 | 4 | Mar 30, 2012 |
| Apple Valley | 4 | 4 | Apr 25, 2010 |
| Martinsburg | 3 | 3 | Mar 30, 2012 |
| Bladensburg | 2 | 2 | May 31, 2002 |
| Danville | 2 | 2 | May 28, 2014 |
| Gambier | 2 | 2 | Aug 19, 2017 |
| South Mount Vernon | 1 | 1 | May 10, 1963 |
Questions about hail in Knox County
How often does it hail in Knox County, Ohio?
80 hail reports have been logged in Knox County since 1961. Over the 20 years 2006–2025 that averages 2.0 reports a year. That ranks #53 of 89 Ohio counties by number of reports.
When is hail season in Knox County?
Most reports come in May, June, March. May alone accounts for 21% of all reports.
What is the largest hail recorded in Knox County?
1.75 in (golf ball size) on August 9, 2012 near 1.74 SW Monroe Mills. 0% of reports here were 2 inches or larger.
When did it last hail in Knox County?
The most recent report in this data is from March 26, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Knox County had in the last five years?
4 separate days with hail reports since November 3, 2021, adding up to 7 reports. The most recent was March 26, 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.