Hail history for Calhoun County, Iowa
Every NOAA hail report filed in Calhoun County since 1960, with preliminary National Weather Service reports to November 3, 2026.
Readout · Calhoun County
- Last hail
- Oct 8, 2026
- 1.50 in, ping pong ball size · preliminary
- Hail days, last 5 years
- 6
- since Nov 3, 2021 · 8 reports
- Largest ever
- 4.00 in
- grapefruit · Jun 30, 2014
135 reports on 76 days since 1960 · #54 of 100 Iowa counties
Hail map · Calhoun 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 Calhoun County is from October 8, 2026. A local roofer can check and document it at no cost.
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What the record says about Calhoun County
The latest hail report in Calhoun County is from October 8, 2026, 1.50 in (ping pong ball size). Since November 3, 2021 there have been 6 separate hail days; the biggest stones in that time were 1.50 in on October 8, 2026.
Over the 20 years 2006–2025, Calhoun County logged 76 reports on 43 hail days, about 3.8 reports a year. That is about the same as the median Iowa county (3.7 a year) and ranks #54 of 100 Iowa counties for all-time reports. Calhoun County holds 1% of all 16,032 hail reports in Iowa.
11% 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 4.00 in (grapefruit) on June 30, 2014 near 0.23 NE Rockwell City.
Reports were down 59% in 2016–2025 (22) compared with 2006–2015 (54). The busiest year was 2014, with 16 reports on 7 days. Hail here peaks in May (31% of reports); 62% fall between April and June.
Reports a year 2006–2025 average
- Calhoun County 3.8
- Median Iowa county 3.7
Hail days 2006–2025
- Calhoun County 43
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Calhoun County 11%
- 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 | 1 | 1 | 2 | ||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 4 | 4 | |||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 4 | 5 | ||||||||||
| 2017 | 2 | 2 | 1 | 5 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Oct 8, 2026 | 3 | 1.50 in | View |
| Jun 16, 2025 | 1 | 0.75 in | — |
| Mar 14, 2025 | 1 | 1.00 in | — |
| May 24, 2024 | 1 | 1.00 in | — |
| Jul 3, 2023 | 1 | 1.00 in | — |
| Jun 5, 2022 | 1 | 0.75 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Jun 30, 2014 | 4.00 ingrapefruit | 0.23 NE Rockwell City | $500K | 09:07 local · NCEI |
| Jun 30, 2014 | 3.00 inteacup | 0.35 WSW Rockwell City | $150K | 09:06 local · NCEI |
| Jun 30, 2014 | 3.00 inteacup | Rockwell City | $250K | 09:03 local · NCEI |
| May 10, 2015 | 2.75 inbaseball | Lake City | $250K | 19:30 local · NCEI |
| Jun 30, 2014 | 2.75 inbaseball | 3.39 N Yetter | $25K | 08:47 local · NCEI |
Size of every report
- Under 1 in 50 37%
- 1–2 in 70 52%
- 2 in + 15 11%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Oct 8, 2026 | 1.50 inping pong ball | 1 N Lake City | 05:54 UTC · NWS prelim. |
| Oct 8, 2026 | 1.00 inquarter | 1 W Lake City | 05:52 UTC · NWS prelim. |
| Oct 8, 2026 | 1.25 inhalf dollar | 3 ENE Auburn | 05:40 UTC · NWS prelim. |
| Jun 16, 2025 | 0.75 inpenny | Pomeroy | 17:42 local · NCEI |
| Mar 14, 2025 | 1.00 inquarter | 2.58 SW Knierim | 16:44 local · NCEI |
| May 24, 2024 | 1.00 inquarter | Rockwell City | 01:05 local · NCEI |
| Jul 3, 2023 | 1.00 inquarter | 4.64 E Jolley | 17:37 local · NCEI |
| Jun 5, 2022 | 0.75 inpenny | 2.06 NE Lavinia | 13:59 local · NCEI |
| Mar 28, 2020 | 1.25 inhalf dollar | 0.51 W Manson | 16:37 local · NCEI |
| Mar 28, 2020 | 1.25 inhalf dollar | 1.72 SW Manson | 16:33 local · NCEI |
| Mar 28, 2020 | 1.50 inping pong ball | Rockwell City | 16:30 local · NCEI |
| Mar 28, 2020 | 1.00 inquarter | Rockwell City | 16:19 local · NCEI |
Cities and towns in Calhoun County
| Place | Reports | Largest |
|---|---|---|
| Rockwell City | 30 | 4.00 in |
| Manson | 21 | 2.50 in |
| Pomeroy | 16 | 1.75 in |
| Lake City | 14 | 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 |
|---|---|---|---|
| Twin Lakes | 9 | 9 | Jul 3, 2023 |
| Farnhamville | 8 | 8 | May 16, 2017 |
| Lohrville | 7 | 7 | Jun 6, 2018 |
| Jolley | 6 | 6 | Jun 5, 2022 |
| Yetter | 5 | 4 | Apr 15, 2017 |
| Somers | 4 | 4 | Aug 9, 2009 |
| Knierim | 1 | 1 | Mar 14, 2025 |
| Rinard | 1 | 1 | Aug 8, 2004 |
Questions about hail in Calhoun County
How often does it hail in Calhoun County, Iowa?
135 hail reports have been logged in Calhoun County since 1960. Over the 20 years 2006–2025 that averages 3.8 reports a year. That ranks #54 of 100 Iowa counties by number of reports.
When is hail season in Calhoun County?
Most reports come in May, June, August. May alone accounts for 31% of all reports.
What is the largest hail recorded in Calhoun County?
4.00 in (grapefruit size) on June 30, 2014 near 0.23 NE Rockwell City. 11% of reports here were 2 inches or larger.
When did it last hail in Calhoun County?
The most recent report in this data is from October 8, 2026 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Calhoun County had in the last five years?
6 separate days with hail reports since November 3, 2021, adding up to 8 reports. The most recent was October 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.