Hail HistoryHome › Wisconsin › Rock County
Hail history for Rock County, WI
112 hail reports in Rock County since 2006 on 60 days. The largest stones measured 2.75 in (baseball) on Apr 18, 2025.
Cities in Rock County
- Janesville
33 hail days - Beloit
34 hail days - Milton
39 hail days - Edgerton
35 hail days - Evansville
19 hail days
Recent hail in Rock County
| Date | Hail size | Where |
|---|---|---|
| Aug 7, 2026 | 0.75 in penny | Janesville 1 hail report |
| Jun 24, 2026 | 1.25 in half dollar | Milton 1 hail report |
| Apr 17, 2026 | 2 in hen egg | Beloit, Milton, Downtown Janesville 4 hail reports |
| Apr 2, 2026 | 1.5 in ping pong ball | Downtown Janesville 4 hail reports |
| Mar 10, 2026 | 1 in quarter | Beloit 1 hail report |
| Aug 16, 2025 | 1.5 in ping pong ball | Downtown Janesville, Clinton, Janesville Airport 7 hail reports |
| Apr 18, 2025 | 2.75 in baseball | Evansville, Fulton, Edgerton 11 hail reports |
One row per day: the largest hail reported in the county that day, the places and the number of reports.
Hail days in Rock County by year
When hail season peaks in Rock County
Damaging thunderstorm winds in Rock County
173 reports of damaging thunderstorm wind in Rock County since 2006, on 99 days. The strongest measured gust was 78 mph on Aug 9, 2009.
| Date | Strongest gust | Where |
|---|---|---|
| Jul 3, 2026 | damage reported | Beloit, Clinton 2 wind reports |
| Jul 2, 2026 | damage reported | Janesville 1 wind report |
| Jun 24, 2026 | 60 mph, estimated | Milton 1 wind report |
| Jun 10, 2026 | 85 mph, estimated | Newark, Fulton, Charlie Bluff 5 wind reports |
| Aug 16, 2025 | 58 mph, estimated | Downtown Janesville 1 wind report |
| Jul 11, 2025 | 76 mph, measured | Evansville 2 wind reports |
| Jun 25, 2025 | 58 mph, estimated | Tiffany 1 wind report |
| Mar 14, 2025 | 75 mph, measured | Mallwood, Milton Jct, Union 7 wind reports |
| Jul 15, 2024 | 63 mph, measured | Evansville 1 wind report |
| Jul 14, 2024 | 58 mph, estimated | Downtown Janesville 3 wind reports |
Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.
Filing a roof or car hail claim?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Rock County; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).