Iowa hail history
Radar has detected 985 major hail days over Iowa since 2011. The largest was 4" hail (baseball size or larger) near Rock Valley on June 28, 2026. Data comes from NOAA's Severe Weather Data Inventory: radar hail signatures, not ground reports.
Data last updated: July 28, 2026
Most recent major hail days
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Largest hail on record here (radar-estimated)
Iowa cities with hail history
Ordered by number of major hail days since 2011.
Hail days by year
2011
69
2012
64
2013
46
2014
68
2015
59
2016
67
2017
66
2018
61
2019
78
2020
52
2021
55
2022
62
2023
61
2024
68
2025
64
2026
45