Hail history for Mahaska County, Iowa
Every NOAA hail report filed in Mahaska County since 1960, with preliminary National Weather Service reports to November 3, 2026.
Readout · Mahaska County
- Last hail
- May 21, 2024
- 1.75 in, golf ball size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 7 reports
- Largest ever
- 4.75 in
- softball · May 8, 2003
91 reports on 57 days since 1960 · #91 of 100 Iowa counties
Hail map · Mahaska 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 Mahaska County
The latest hail report in Mahaska County is from May 21, 2024, 1.75 in (golf ball size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 2.00 in on May 7, 2023.
Over the 20 years 2006–2025, Mahaska County logged 40 reports on 24 hail days, about 2.0 reports a year. That is about half the median Iowa county (3.7 a year) and ranks #91 of 100 Iowa counties for all-time reports. Mahaska County holds 1% of all 16,032 hail reports in Iowa.
14% 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 4.75 in (softball) on May 8, 2003 near 8 N Oskaloosa.
Reports were down 67% in 2016–2025 (10) compared with 2006–2015 (30). The busiest year was 1996, with 12 reports on 2 days. Hail here peaks in May (38% of reports); 77% fall between April and June.
Reports a year 2006–2025 average
- Mahaska County 2.0
- Median Iowa county 3.7
Hail days 2006–2025
- Mahaska County 24
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Mahaska County 14%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 3 | 3 | 6 | ||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 2 | 1 | 3 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 21, 2024 | 1 | 1.75 in | — |
| Jul 28, 2023 | 1 | 1.75 in | — |
| Jul 17, 2023 | 2 | 1.00 in | — |
| May 7, 2023 | 3 | 2.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 8, 2003 | 4.75 insoftball | 8 N Oskaloosa | $50K | 18:24 local · NCEI |
| Aug 28, 1990 | 4.50 insoftball | — | — | 23:26 local · NCEI |
| Jun 5, 2011 | 3.00 inteacup | 2.59 SW Oskaloosa | $10K | 03:45 local · NCEI |
| Jun 15, 2017 | 2.75 inbaseball | 1.37 NNE Givin | $10K | 21:10 local · NCEI |
| May 24, 1996 | 2.75 inbaseball | 5 N Oskaloosa | $530K | 08:25 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 26 29%
- 1–2 in 52 57%
- 2 in + 13 14%
Most recent reports
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 21, 2024 | 1.75 ingolf ball | 0.52 E Taintor | — | 10:39 local · NCEI |
| Jul 28, 2023 | 1.75 ingolf ball | 1.71 ENE Truax | — | 21:36 local · NCEI |
| Jul 17, 2023 | 1.00 inquarter | 0.86 NE Oskaloosa | — | 07:33 local · NCEI |
| Jul 17, 2023 | 1.00 inquarter | 0.86 NE Oskaloosa | — | 07:32 local · NCEI |
| May 7, 2023 | 2.00 inhen egg | 0.52 E Rose Hill | — | 16:43 local · NCEI |
| May 7, 2023 | 2.00 inhen egg | 0.52 W Rose Hill | — | 16:41 local · NCEI |
| May 7, 2023 | 1.00 inquarter | 0.52 W Lacey | — | 16:22 local · NCEI |
| Jun 15, 2017 | 2.75 inbaseball | 1.37 NNE Givin | $10K | 21:10 local · NCEI |
| Apr 15, 2017 | 1.00 inquarter | 4.66 E New Sharon | — | 19:08 local · NCEI |
| Apr 10, 2017 | 1.25 inhalf dollar | 1.04 E New Sharon | — | 00:02 local · NCEI |
| Jun 20, 2015 | 1.75 ingolf ball | 1.48 NNE University Park | $10K | 16:55 local · NCEI |
| Jun 20, 2015 | 2.00 inhen egg | 0.86 SE Oskaloosa | $10K | 16:50 local · NCEI |
Cities and towns in Mahaska 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 |
|---|---|---|---|
| New Sharon | 9 | 9 | Apr 10, 2017 |
| Leighton | 6 | 6 | Apr 3, 2011 |
| Keomah Village | 5 | 3 | Apr 3, 2007 |
| Fremont | 4 | 4 | Apr 3, 2011 |
| Barnes City | 3 | 2 | May 22, 2011 |
| Rose Hill | 3 | 2 | May 7, 2023 |
Questions about hail in Mahaska County
How often does it hail in Mahaska County, Iowa?
91 hail reports have been logged in Mahaska County since 1960. Over the 20 years 2006–2025 that averages 2.0 reports a year. That ranks #91 of 100 Iowa counties by number of reports.
When is hail season in Mahaska County?
Most reports come in May, April, June. May alone accounts for 38% of all reports.
What is the largest hail recorded in Mahaska County?
4.75 in (softball size) on May 8, 2003 near 8 N Oskaloosa. 14% of reports here were 2 inches or larger.
When did it last hail in Mahaska County?
The most recent report in this data is from May 21, 2024 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Mahaska County had in the last five years?
4 separate days with hail reports since November 3, 2021, adding up to 7 reports. The most recent was May 21, 2024.
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.