Hail in McHenry County, Illinois

Hail in McHenry County, Illinois: 192 recorded events between 1972 and 2026. The strongest on record measured 2.75. That places the county #664 nationally and #18 statewide for this hazard.

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for hail in McHenry County is the 2010s, when 88 of the county's 192 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the McHenry County archive, hail makes up 29.4% of all recorded severe weather across 8 hazard types. Nationally the county sits at #664 for this hazard and #18 within Illinois, putting it in the 78.6 percentile of all U.S. counties.

May is the peak month for hail in McHenry County with 47 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

• Thunderstorm Wind 351

How many hail events are on record in McHenry County, Illinois?

192 hail events are recorded in McHenry County between 1972 and 2026, causing 0 direct deaths.

What is the strongest hail recorded in McHenry County?

The strongest hail on record in McHenry County measured 2.75.

Where does the hail data for McHenry County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.