Hail in Grundy County, Iowa

Hail in Grundy County, Iowa: 91 recorded events between 1960 and 2025. The strongest on record measured 3. That places the county #1,557 nationally and #91 statewide for this hazard.

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

The busiest decade for hail in Grundy County is the 2000s, when 42 of the county's 91 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 Grundy County archive, hail makes up 26.0% of all recorded severe weather across 8 hazard types. Nationally the county sits at #1,557 for this hazard and #91 within Iowa, putting it in the 49.7 percentile of all U.S. counties.

May is the peak month for hail in Grundy County with 28 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 120
• Heavy Rain 50
• Tornado 41

How many hail events are on record in Grundy County, Iowa?

91 hail events are recorded in Grundy County between 1960 and 2025, causing 0 direct deaths.

What is the strongest hail recorded in Grundy County?

The strongest hail on record in Grundy County measured 3.

Where does the hail data for Grundy 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.