Hail HistoryHome › Illinois › Mchenry County
Hail history for Mchenry County, IL
149 hail reports in Mchenry County since 2006 on 61 days. The largest stones measured 2.75 in (baseball) on May 2, 2018.
Cities in Mchenry County
- Crystal Lake
53 hail days - Algonquin
59 hail days - Lake in the Hills
55 hail days - McHenry
40 hail days - Huntley
53 hail days - Woodstock
41 hail days - Cary
56 hail days - Harvard
22 hail days - Marengo
26 hail days - Johnsburg
30 hail days - Lakemoor
42 hail days - Spring Grove
32 hail days - Fox River Grove
52 hail days - Wonder Lake
30 hail days - Lakewood
55 hail days - Pistakee Highlands
32 hail days
Recent hail in Mchenry County
| Date | Hail size | Where |
|---|---|---|
| Jun 24, 2026 | 1.5 in ping pong ball | Huntley, Algonquin, Lake In The Hills 4 hail reports |
| Apr 15, 2026 | 1 in quarter | Big Foot 1 hail report |
| Apr 14, 2026 | 1 in quarter | Huntley 1 hail report |
| Aug 16, 2025 | 1.5 in ping pong ball | Port Barrington, Fox River Grove, Woodstock 3 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 Mchenry County by year
When hail season peaks in Mchenry County
Damaging thunderstorm winds in Mchenry County
270 reports of damaging thunderstorm wind in Mchenry County since 2006, on 114 days. The strongest measured gust was 76 mph on Apr 17, 2026.
| Date | Strongest gust | Where |
|---|---|---|
| Aug 12, 2026 | damage reported | Algonquin 1 wind report |
| Jun 11, 2026 | 60 mph, estimated | Ridgefield, Bull Valley 2 wind reports |
| Jun 10, 2026 | 69 mph, estimated | Crystal Lake, Franklinville, Huntley 4 wind reports |
| Apr 17, 2026 | 76 mph, measured | Riley, Alden 2 wind reports |
| Apr 14, 2026 | 72 mph, measured | Harvard 2 wind reports |
| Apr 2, 2026 | 64 mph, estimated | Wonder Lake, Sunnyside, Woodstock 5 wind reports |
| Sep 21, 2025 | 63 mph, estimated | Lakemoor, Bull Valley 2 wind reports |
| Aug 17, 2025 | 63 mph, measured | Algonquin 1 wind report |
| Aug 16, 2025 | 64 mph, estimated | Lake In The Hills Airport, Fox River Grove, Woodstock 7 wind reports |
| Jul 11, 2025 | 63 mph, estimated | Huntley 1 wind report |
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 Mchenry 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).