Hail history for Clay County, Iowa
Every NOAA hail report filed in Clay County since 1957, with preliminary National Weather Service reports to November 3, 2026.
Readout · Clay County
- Last hail
- Aug 8, 2026
- 0.70 in, marble size · preliminary
- Hail days, last 5 years
- 14
- since Nov 3, 2021 · 26 reports
- Largest ever
- 4.25 in
- grapefruit · May 21, 2004
253 reports on 135 days since 1957 · #11 of 100 Iowa counties
Hail map · Clay County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Clay County
The latest hail report in Clay County is from August 8, 2026, 0.70 in (marble size). Since November 3, 2021 there have been 14 separate hail days; the biggest stones in that time were 3.00 in on May 20, 2024.
Over the 20 years 2006–2025, Clay County logged 86 reports on 47 hail days, about 4.3 reports a year. That is 16% more than the median Iowa county (3.7 a year) and ranks #11 of 100 Iowa counties for all-time reports. Clay County holds 2% of all 16,032 hail reports in Iowa.
7% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median Iowa county. The largest hail on record here is 4.25 in (grapefruit) on May 21, 2004 near 5 S Spencer.
Reports held about level in 2016–2025 (45) compared with 2006–2015 (41). The busiest year was 2004, with 27 reports on 8 days. Hail here peaks in June (28% of reports); 61% fall between April and June.
Reports a year 2006–2025 average
- Clay County 4.3
- Median Iowa county 3.7
Hail days 2006–2025
- Clay County 47
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Clay County 7%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 3 | 1 | 1 | 1 | 6 | ||||||||
| 2025 | 2 | 1 | 3 | ||||||||||
| 2024 | 7 | 5 | 12 | ||||||||||
| 2023 | 2 | 2 | |||||||||||
| 2022 | 3 | 3 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 6 | 1 | 7 | ||||||||||
| 2018 | 1 | 4 | 3 | 3 | 11 | ||||||||
| 2017 | 2 | 1 | 1 | 4 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 8, 2026 | 1 | 0.70 in | View |
| Jun 28, 2026 | 1 | 1.50 in | — |
| May 15, 2026 | 1 | 1.25 in | — |
| Apr 13, 2026 | 3 | 1.50 in | — |
| Jun 16, 2025 | 1 | 0.88 in | — |
| Apr 28, 2025 | 2 | 1.50 in | — |
| Jun 21, 2024 | 2 | 1.00 in | — |
| Jun 17, 2024 | 2 | 1.00 in | — |
| Jun 12, 2024 | 1 | 0.88 in | — |
| May 24, 2024 | 1 | 1.75 in | — |
| May 20, 2024 | 6 | 3.00 in | — |
| Oct 23, 2023 | 2 | 1.00 in | — |
| Apr 23, 2022 | 1 | 0.88 in | — |
| Apr 12, 2022 | 2 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 21, 2004 | 4.25 ingrapefruit | 5 S Spencer | $500K | 16:19 local · NCEI |
| May 21, 2004 | 4.25 ingrapefruit | Spencer | $500K | 10:05 local · NCEI |
| May 20, 2024 | 3.00 inteacup | 3.11 WSW Royal | — | 18:44 local · NCEI |
| Sep 8, 2005 | 2.75 inbaseball | 2 NW Everly | $500K | 08:30 local · NCEI |
| May 21, 2004 | 2.75 inbaseball | 2 E Royal | — | 16:19 local · NCEI |
Size of every report
- Under 1 in 108 43%
- 1–2 in 127 50%
- 2 in + 18 7%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 8, 2026 | 0.70 inmarble | 1 NNE Spencer | 08:39 UTC · NWS prelim. |
| Jun 28, 2026 | 1.50 inping pong ball | 0.51 W Webb | 06:14 local · NCEI |
| May 15, 2026 | 1.25 inhalf dollar | 1.47 NNW Greenville | 18:30 local · NCEI |
| Apr 13, 2026 | 1.50 inping pong ball | 4.1 NE Webb | 18:58 local · NCEI |
| Apr 13, 2026 | 1.00 inquarter | 0.51 W Webb | 18:52 local · NCEI |
| Apr 13, 2026 | 1.00 inquarter | 1.47 NNW Peterson | 18:24 local · NCEI |
| Jun 16, 2025 | 0.88 innickel | 2.31 NNE Webb | 17:15 local · NCEI |
| Apr 28, 2025 | 1.50 inping pong ball | 0.5 E Dickens | 16:20 local · NCEI |
| Apr 28, 2025 | 1.00 inquarter | 0.85 SE Fostoria | 15:24 local · NCEI |
| Jun 21, 2024 | 1.00 inquarter | 6.2 ENE Dickens | 16:47 local · NCEI |
| Jun 21, 2024 | 1.00 inquarter | 0.86 NE Everly | 15:50 local · NCEI |
| Jun 17, 2024 | 0.75 inpenny | 2.12 WNW Dickens | 16:00 local · NCEI |
Cities and towns in Clay County
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Greenville | 8 | 7 | May 15, 2026 |
| Rossie | 7 | 7 | May 8, 2018 |
Questions about hail in Clay County
How often does it hail in Clay County, Iowa?
253 hail reports have been logged in Clay County since 1957. Over the 20 years 2006–2025 that averages 4.3 reports a year. That ranks #11 of 100 Iowa counties by number of reports.
When is hail season in Clay County?
Most reports come in June, May, July. June alone accounts for 28% of all reports.
What is the largest hail recorded in Clay County?
4.25 in (grapefruit size) on May 21, 2004 near 5 S Spencer. 7% of reports here were 2 inches or larger.
When did it last hail in Clay County?
The most recent report in this data is from August 8, 2026 (0.70 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Clay County had in the last five years?
14 separate days with hail reports since November 3, 2021, adding up to 26 reports. The most recent was August 8, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.