Hail in Union County, Iowa

Hail in Union County, Iowa: 120 recorded events between 1956 and 2025. The strongest on record measured 3. That places the county #1,204 nationally and #69 statewide for this hazard.

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

The busiest decade for hail in Union County is the 2010s, when 42 of the county's 120 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 Union County archive, hail makes up 29.6% of all recorded severe weather across 8 hazard types. Nationally the county sits at #1,204 for this hazard and #69 within Iowa, putting it in the 61.2 percentile of all U.S. counties.

Jun is the peak month for hail in Union County with 45 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 138
• Heavy Rain 59
• Tornado 42

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

120 hail events are recorded in Union County between 1956 and 2025, causing 0 direct deaths.

What is the strongest hail recorded in Union County?

The strongest hail on record in Union County measured 3.

Where does the hail data for Union 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.