Hail HistoryHail history for Clayton County, IA
89 hail reports in Clayton County since 2006 on 38 days. The largest stones measured 2.50 in (tennis ball) on Apr 14, 2026.
Recent hail in Clayton County
| Date | Size hail | Where |
|---|---|---|
| Sep 4, 2026 | 1.50 in ping pong ball | Monona, Giard 2 hail reports |
| Aug 21, 2026 | 0.25 in pea | Guttenberg 1 hail report |
| Jul 2, 2026 | 1.00 in 25-sent coin | Guttenberg 2 hail reports |
| Apr 14, 2026 | 2.50 in tennis ball | Monona 1 hail report |
| Apr 18, 2025 | 1.50 in ping pong ball | Guttenburg, Osterdock, Osborne 5 hail reports |
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Hail days in Clayton County by year
When hail season peaks in Clayton County
Damaging thunderstorm winds in Clayton County
99 reports of damaging thunderstorm wind in Clayton County since 2006, on 54 days. The strongest measured gust was 72 mph on Mar 6, 2017.
| Date | Strongest gust | Where |
|---|---|---|
| May 15, 2026 | 70 mph, a measured | Watson, Osborne 2 wind reports |
| Jul 11, 2025 | 58 mph, a estimat | Garber 1 wind report |
| Sep 19, 2024 | 58 mph, a estimat | Garnavillo, National 2 wind reports |
| Jul 15, 2024 | 75 mph, a estimat | North Buena Vista 1 wind report |
| Jun 12, 2024 | 69 mph, a estimat | Luana, Guttenburg 2 wind reports |
| May 21, 2024 | 66 mph, a measured | Monona 1 wind report |
| Mar 31, 2023 | 61 mph, a estimat | Guttenburg 1 wind report |
| Jul 24, 2022 | 46 mph, a estimat | Guttenburg 1 wind report |
| Jul 23, 2022 | 66 mph, a estimat | Strawberry Pt 1 wind report |
| Jul 4, 2022 | 46 mph, a estimat | Littleport 1 wind report |
Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.
Filing a roof or car hail claim?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Clayton County; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).