◆ MONONA, IA HAIL HISTORY · CLAYTON COUNTY
Monona, IA hail history & hail map
Monona, Iowa has had 5 hail events in the past 5 years, with hail up to 6.00″ (Softball). Most recent: Sep 4, 2026. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
5Hail events in the past 5 years
6.00″Largest recorded hail · Softball
2.50″Largest ground report (within 3 mi)
6.00″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Monona, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Monona
| Date | Peak hail | Sources |
|---|---|---|
| Sep 4, 2026 | 1.50″ Ping Pong Ball | Radar 1.50″ · 1 ground report (max 1.50″) |
| Apr 14, 2026 | 2.50″ Tennis Ball | 1 ground report (max 2.50″) |
| Mar 30, 2024 | 0.25″ Small | 1 ground report (max 0.25″) |
| Mar 29, 2024 | 0.25″ Small | 1 ground report (max 0.25″) |
| Feb 22, 2022 | 6.00″ Softball | Radar 6.00″ |
More Iowa hail history
Events count days with NOAA MRMS radar hail over Monona (43.050, -91.390) or an NWS / CoCoRaHS hail report within 3 miles. Data window: NOAA MRMS radar hail swaths Oct 2021 – Nov 2026; NWS / NCEI Storm Events reports Nov 2024 – Jul 2026; CoCoRaHS volunteer reports Oct 2021 – present. Radar hail sizes are estimates, not ground truth; hail at any single address can differ.