Hail in Winnebago County, Iowa

Hail in Winnebago County, Iowa: 105 recorded events between 1961 and 2025. The strongest on record measured 3.5. That places the county #1,379 nationally and #79 statewide for this hazard.

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

The busiest decade for hail in Winnebago County is the 2000s, when 45 of the county's 105 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 Winnebago County archive, hail makes up 33.1% of all recorded severe weather across 8 hazard types. Nationally the county sits at #1,379 for this hazard and #79 within Iowa, putting it in the 55.4 percentile of all U.S. counties.

Jun is the peak month for hail in Winnebago County with 35 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 117

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

105 hail events are recorded in Winnebago County between 1961 and 2025, causing 0 direct deaths.

What is the strongest hail recorded in Winnebago County?

The strongest hail on record in Winnebago County measured 3.5.

Where does the hail data for Winnebago 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.