Hail history for Iowa County, Iowa
Every NOAA hail report filed in Iowa County since 1971, with preliminary National Weather Service reports to November 3, 2026.
Readout · Iowa County
- Last hail
- Aug 11, 2026
- 0.50 in, marble size · preliminary
- Hail days, last 5 years
- 11
- since Nov 3, 2021 · 19 reports
- Largest ever
- 2.75 in
- baseball · May 7, 2023
128 reports on 72 days since 1971 · #60 of 100 Iowa counties
Hail map · Iowa County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Iowa County is from August 11, 2026. A local roofer can check and document it at no cost.
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What the record says about Iowa County
The latest hail report in Iowa County is from August 11, 2026, 0.50 in (marble size). Since November 3, 2021 there have been 11 separate hail days; the biggest stones in that time were 2.75 in on May 7, 2023.
Over the 20 years 2006–2025, Iowa County logged 87 reports on 46 hail days, about 4.3 reports a year. That is 18% more than the median Iowa county (3.7 a year) and ranks #60 of 100 Iowa counties for all-time reports. Iowa County holds 1% of all 16,032 hail reports in Iowa.
4% 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 2.75 in (baseball) on May 7, 2023 near 1.24 SE Koszta.
Reports were down 53% in 2016–2025 (28) compared with 2006–2015 (59). The busiest year was 2011, with 17 reports on 5 days. Hail here peaks in May (32% of reports); 72% fall between April and June.
Reports a year 2006–2025 average
- Iowa County 4.3
- Median Iowa county 3.7
Hail days 2006–2025
- Iowa County 46
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Iowa County 4%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 3 | 3 | |||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 2 | 1 | 1 | 4 | |||||||||
| 2023 | 1 | 2 | 8 | 11 | |||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 2 | 2 | |||||||||||
| 2019 | 3 | 3 | |||||||||||
| 2018 | 1 | 1 | 1 | 3 | |||||||||
| 2017 | 1 | 1 | 2 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 11, 2026 | 2 | 0.50 in | View |
| Aug 7, 2026 | 1 | 1.50 in | View |
| Oct 24, 2024 | 1 | 1.00 in | — |
| May 21, 2024 | 1 | 1.00 in | — |
| Apr 27, 2024 | 1 | 1.00 in | — |
| Apr 16, 2024 | 1 | 1.00 in | — |
| May 13, 2023 | 1 | 1.25 in | — |
| May 7, 2023 | 7 | 2.75 in | — |
| Apr 4, 2023 | 2 | 1.00 in | — |
| Jan 16, 2023 | 1 | 1.00 in | — |
| Mar 5, 2022 | 1 | 0.75 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 7, 2023 | 2.75 inbaseball | 1.24 SE Koszta | — | 15:28 local · NCEI |
| May 10, 2003 | 2.75 inbaseball | 3 S Williamsburg | $1.0 million | 16:53 local · NCEI |
| May 22, 2011 | 2.00 inhen egg | 0.86 SW Williamsburg | — | 14:04 local · NCEI |
| May 13, 1974 | 2.00 inhen egg | — | — | 07:20 local · NCEI |
| Apr 13, 1974 | 2.00 inhen egg | — | — | 18:15 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 48 38%
- 1–2 in 75 59%
- 2 in + 5 4%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 11, 2026 | 0.50 inmarble | 2 NW East Amana | 10:53 UTC · NWS prelim. |
| Aug 11, 2026 | 0.50 inmarble | 2 NW East Amana | 10:30 UTC · NWS prelim. |
| Aug 7, 2026 | 1.50 inping pong ball | North English | 00:25 UTC · NWS prelim. |
| Oct 24, 2024 | 1.00 inquarter | 0.69 N East Amana | 20:17 local · NCEI |
| May 21, 2024 | 1.00 inquarter | 4.02 SSW Homestead | 11:43 local · NCEI |
| Apr 27, 2024 | 1.00 inquarter | 0.52 E Victor | 16:22 local · NCEI |
| Apr 16, 2024 | 1.00 inquarter | 0.86 NE North English | 14:44 local · NCEI |
| May 13, 2023 | 1.25 inhalf dollar | 2.58 W Williamsburg | 11:45 local · NCEI |
| May 7, 2023 | 1.00 inquarter | 0.69 S Williamsburg | 16:10 local · NCEI |
| May 7, 2023 | 1.00 inquarter | Amana Apt | 15:57 local · NCEI |
| May 7, 2023 | 1.50 inping pong ball | Middle Amana | 15:56 local · NCEI |
| May 7, 2023 | 1.00 inquarter | 0.86 SW Marengo | 15:35 local · NCEI |
Cities and towns in Iowa County
| Place | Reports | Largest |
|---|---|---|
| North English | 18 | 2.00 in |
| Marengo | 17 | 1.75 in |
| Williamsburg | 14 | 2.75 in |
| Victor | 13 | 1.75 in |
| Ladora | 12 | 1.75 in |
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 |
|---|---|---|---|
| Amana | 9 | 8 | Aug 11, 2026 |
| Millersburg | 7 | 6 | May 26, 2016 |
| Homestead | 5 | 5 | May 21, 2024 |
| Middle Amana | 4 | 4 | May 7, 2023 |
| Parnell | 4 | 4 | Aug 28, 2018 |
| West Amana | 4 | 4 | May 29, 2013 |
| Conroy | 3 | 3 | Apr 5, 2010 |
| Lost Nation | 2 | 2 | Apr 2, 2006 |
| South Amana | 1 | 1 | Apr 13, 2006 |
Questions about hail in Iowa County
How often does it hail in Iowa County, Iowa?
128 hail reports have been logged in Iowa County since 1971. Over the 20 years 2006–2025 that averages 4.3 reports a year. That ranks #60 of 100 Iowa counties by number of reports.
When is hail season in Iowa County?
Most reports come in May, June, April. May alone accounts for 32% of all reports.
What is the largest hail recorded in Iowa County?
2.75 in (baseball size) on May 7, 2023 near 1.24 SE Koszta. 4% of reports here were 2 inches or larger.
When did it last hail in Iowa County?
The most recent report in this data is from August 11, 2026 (0.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Iowa County had in the last five years?
11 separate days with hail reports since November 3, 2021, adding up to 19 reports. The most recent was August 11, 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.