Hail history for Cerro Gordo County, Iowa
Every NOAA hail report filed in Cerro Gordo County since 1959, with preliminary National Weather Service reports to November 3, 2026.
Readout · Cerro Gordo County
- Last hail
- Sep 16, 2025
- 1.00 in, quarter size
- Hail days, last 5 years
- 7
- since Nov 3, 2021 · 18 reports
- Largest ever
- 3.00 in
- teacup · Jun 18, 1974
184 reports on 91 days since 1959 · #24 of 100 Iowa counties
Hail map · Cerro Gordo 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 Cerro Gordo County is from September 16, 2025. A local roofer can check and document it at no cost.
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What the record says about Cerro Gordo County
The latest hail report in Cerro Gordo County is from September 16, 2025, 1.00 in (quarter size). Since November 3, 2021 there have been 7 separate hail days; the biggest stones in that time were 1.75 in on October 24, 2024.
Over the 20 years 2006–2025, Cerro Gordo County logged 102 reports on 47 hail days, about 5.1 reports a year. That is 38% more than the median Iowa county (3.7 a year) and ranks #24 of 100 Iowa counties for all-time reports. Cerro Gordo County holds 1% of all 16,032 hail reports in Iowa.
2% 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 3.00 in (teacup) on June 18, 1974.
Reports were up 32% in 2016–2025 (58) compared with 2006–2015 (44). The busiest year was 2003, with 16 reports on 5 days. Hail here peaks in May (26% of reports); 61% fall between April and June.
Reports a year 2006–2025 average
- Cerro Gordo County 5.1
- Median Iowa county 3.7
Hail days 2006–2025
- Cerro Gordo County 47
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Cerro Gordo County 2%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 3 | 1 | 1 | 5 | |||||||||
| 2024 | 6 | 6 | |||||||||||
| 2023 | 3 | 1 | 4 | ||||||||||
| 2022 | 3 | 3 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 5 | 1 | 7 | |||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 3 | 2 | 6 | 12 | ||||||||
| 2017 | 1 | 6 | 6 | 13 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Sep 16, 2025 | 1 | 1.00 in | — |
| Jun 20, 2025 | 1 | 1.00 in | — |
| Apr 28, 2025 | 3 | 1.00 in | — |
| Oct 24, 2024 | 6 | 1.75 in | — |
| Aug 11, 2023 | 1 | 1.00 in | — |
| Mar 31, 2023 | 3 | 1.00 in | — |
| Apr 12, 2022 | 3 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Jun 18, 1974 | 3.00 inteacup | — | — | 18:30 local · NCEI |
| Jul 31, 2003 | 2.75 inbaseball | Rockwell | $25K | 22:00 local · NCEI |
| Jul 31, 2003 | 2.50 intennis ball | Rockwell | $50K | 21:58 local · NCEI |
| Oct 24, 2024 | 1.75 ingolf ball | 3.33 WNW Burchinal | — | 15:49 local · NCEI |
| Aug 24, 2018 | 1.75 ingolf ball | 0.86 NE Clear Lake | $5K | 17:50 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 67 36%
- 1–2 in 114 62%
- 2 in + 3 2%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Sep 16, 2025 | 1.00 inquarter | 0.51 E Swaledale | 15:25 local · NCEI |
| Jun 20, 2025 | 1.00 inquarter | 6.4 NNW (Mcw)mason City Muni | 05:18 local · NCEI |
| Apr 28, 2025 | 0.88 innickel | 1.47 NNW Mason City | 20:37 local · NCEI |
| Apr 28, 2025 | 1.00 inquarter | 0.5 E Ventura | 20:22 local · NCEI |
| Apr 28, 2025 | 0.75 inpenny | 6.4 NNW (Mcw)mason City Muni | 20:02 local · NCEI |
| Oct 24, 2024 | 0.88 innickel | 0.86 SE Mason City | 16:05 local · NCEI |
| Oct 24, 2024 | 1.00 inquarter | Mason City | 16:02 local · NCEI |
| Oct 24, 2024 | 0.88 innickel | 0.86 NE Mason City | 16:02 local · NCEI |
| Oct 24, 2024 | 0.88 innickel | Central Hgts | 15:57 local · NCEI |
| Oct 24, 2024 | 1.75 ingolf ball | 3.33 WNW Burchinal | 15:49 local · NCEI |
| Oct 24, 2024 | 1.00 inquarter | 1.01 E Clear Lake | 15:49 local · NCEI |
| Aug 11, 2023 | 1.00 inquarter | Thornton | 20:21 local · NCEI |
Cities and towns in Cerro Gordo County
| Place | Reports | Largest |
|---|---|---|
| Mason City | 71 | 3.00 in |
| Clear Lake | 33 | 1.75 in |
| Thornton | 13 | 1.75 in |
| Rockwell | 12 | 2.75 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 |
|---|---|---|---|
| Ventura | 9 | 7 | Apr 28, 2025 |
| Rock Falls | 4 | 4 | Sep 21, 2016 |
| Burchinal | 3 | 3 | Jun 21, 2020 |
| Dougherty | 3 | 3 | May 15, 2017 |
| Fertile | 3 | 3 | Jun 20, 2025 |
| Swaledale | 1 | 1 | Sep 16, 2025 |
Questions about hail in Cerro Gordo County
How often does it hail in Cerro Gordo County, Iowa?
184 hail reports have been logged in Cerro Gordo County since 1959. Over the 20 years 2006–2025 that averages 5.1 reports a year. That ranks #24 of 100 Iowa counties by number of reports.
When is hail season in Cerro Gordo County?
Most reports come in May, June, July. May alone accounts for 26% of all reports.
What is the largest hail recorded in Cerro Gordo County?
3.00 in (teacup size) on June 18, 1974. 2% of reports here were 2 inches or larger.
When did it last hail in Cerro Gordo County?
The most recent report in this data is from September 16, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Cerro Gordo County had in the last five years?
7 separate days with hail reports since November 3, 2021, adding up to 18 reports. The most recent was September 16, 2025.
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.