Hail HistoryHome › Wisconsin › Waukesha County
Hail history for Waukesha County, WI
195 hail reports in Waukesha County since 2006 on 72 days. The largest stones measured 3.75 in on Aug 2, 2015.
Cities in Waukesha County
- Waukesha
47 hail days - New Berlin
58 hail days - Brookfield
58 hail days - Menomonee Falls
46 hail days - Muskego
50 hail days - Oconomowoc
36 hail days - Sussex
51 hail days - Hartland
46 hail days - Pewaukee
48 hail days - Mukwonago
34 hail days - Delafield
47 hail days - Elm Grove
60 hail days - Okauchee Lake
40 hail days - Merton
42 hail days - Wales
53 hail days
Recent hail in Waukesha County
| Date | Hail size | Where |
|---|---|---|
| Aug 10, 2026 | 0.75 in penny | Hales Corners 1 hail report |
| Aug 9, 2026 | 1.25 in half dollar | Mukwonago 2 hail reports |
| Jul 27, 2026 | 2.5 in tennis ball | Oconomowoc, Lac La Belle, Delafield 4 hail reports |
| Apr 17, 2026 | 1 in quarter | Eagle 2 hail reports |
| Apr 14, 2026 | 2 in hen egg | Menomonee Falls, Merton, Monches 7 hail reports |
| Sep 22, 2025 | 0.75 in penny | New Berlin, Tess Corners 2 hail reports |
| May 15, 2025 | 2 in hen egg | Big Bend, Eagle, Dousman 13 hail reports |
| Apr 18, 2025 | 2 in hen egg | North Prairie, Saylesville, Jericho 15 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 Waukesha County by year
When hail season peaks in Waukesha County
Damaging thunderstorm winds in Waukesha County
197 reports of damaging thunderstorm wind in Waukesha County since 2006, on 105 days. The strongest measured gust was 79 mph on Jun 21, 2011.
| Date | Strongest gust | Where |
|---|---|---|
| Aug 18, 2026 | damage reported | Sussex, Menomonee Falls, Waukesha 5 wind reports |
| Jul 27, 2026 | 62 mph, measured | North Prairie, Eagle 2 wind reports |
| Jul 2, 2026 | 64 mph, measured | Menomonee Falls, Hartland, Pewaukee 3 wind reports |
| Jun 10, 2026 | 60 mph, estimated | Lannon 1 wind report |
| Apr 14, 2026 | 81 mph, estimated | Oconomowoc Lake 1 wind report |
| Sep 22, 2025 | 58 mph, estimated | Delafield 1 wind report |
| Aug 12, 2025 | 64 mph, estimated | Delafield 1 wind report |
| May 16, 2025 | 66 mph, measured | Summit Corners, Oconomowoc Lake 2 wind reports |
| Mar 15, 2025 | 67 mph, measured | Summit Corners, Phantom Lake, Oconomowoc 3 wind reports |
| Aug 27, 2024 | 58 mph, estimated | Oconomowoc, Delafield, Fussville 4 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 Waukesha 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).