Hail history for Oskaloosa, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Oskaloosa since 1980, with preliminary reports to November 3, 2026.
Readout · Oskaloosa
- Last hail
- Jul 17, 2023
- 1.00 in, quarter size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 2 reports
- Largest ever
- 2.75 in
- baseball · Jun 15, 2017
24 reports on 19 days since 1980 · #119 of 483 Iowa places
Hail map · Oskaloosa
- 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 Oskaloosa
The latest hail report in and around Oskaloosa is from July 17, 2023, 1.00 in (quarter size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.00 in on July 17, 2023.
Over the 20 years 2006–2025, Oskaloosa logged 13 reports on 9 hail days, about 0.7 reports a year. That is 44% more than the median Iowa town on this site (0.5 a year) and ranks #119 of 483 Iowa cities and towns on this site for all-time reports. Oskaloosa accounts for 26% of the 91 reports filed in Mahaska County.
8% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Iowa town on this site. The largest hail on record here is 2.75 in (baseball) on June 15, 2017 near 1.37 NNE Givin.
Reports were down 70% in 2016–2025 (3) compared with 2006–2015 (10). The busiest year was 2023, with 2 reports on 1 day. Hail here peaks in May (29% of reports); 75% fall between April and June.
Reports a year 2006–2025 average
- Oskaloosa 0.7
- Mahaska County 2.0
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Oskaloosa 9
- Mahaska County 24
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Oskaloosa 8%
- Mahaska County 14%
- Median Iowa town on this site 6%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 2 | 2 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jul 17, 2023 | 2 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 15, 2017 | 2.75 inbaseball | 1.37 NNE Givin | Mahaska | $10K | 21:10 local · NCEI |
| Jun 20, 2015 | 2.00 inhen egg | 0.86 SE Oskaloosa | Mahaska | $10K | 16:50 local · NCEI |
| Jun 20, 2015 | 1.75 ingolf ball | 1.48 NNE University Park | Mahaska | $10K | 16:55 local · NCEI |
| Jun 5, 2011 | 1.75 ingolf ball | 0.86 SE Oskaloosa | Mahaska | $5K | 03:45 local · NCEI |
| May 8, 2003 | 1.75 ingolf ball | Lovilia | Monroe | $10K | 18:20 local · NCEI |
Size of every report
- Under 1 in 9 38%
- 1–2 in 13 54%
- 2 in + 2 8%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jul 17, 2023 | 1.00 inquarter | 0.86 NE Oskaloosa | Mahaska | — | 07:33 local · NCEI |
| Jul 17, 2023 | 1.00 inquarter | 0.86 NE Oskaloosa | Mahaska | — | 07:32 local · NCEI |
| Jun 15, 2017 | 2.75 inbaseball | 1.37 NNE Givin | Mahaska | $10K | 21:10 local · NCEI |
| Jun 20, 2015 | 1.75 ingolf ball | 1.48 NNE University Park | Mahaska | $10K | 16:55 local · NCEI |
| Jun 20, 2015 | 2.00 inhen egg | 0.86 SE Oskaloosa | Mahaska | $10K | 16:50 local · NCEI |
| Jun 22, 2014 | 0.88 innickel | 0.86 SE Oskaloosa | Mahaska | — | 13:49 local · NCEI |
| Mar 27, 2014 | 0.88 innickel | 2.08 SE Beacon | Mahaska | — | 17:10 local · NCEI |
| Aug 7, 2013 | 1.00 inquarter | 0.86 NE Oskaloosa | Mahaska | — | 00:35 local · NCEI |
| Aug 6, 2013 | 1.00 inquarter | 0.86 NE Oskaloosa | Mahaska | — | 23:55 local · NCEI |
| Apr 14, 2012 | 0.75 inpenny | 0.52 W Oskaloosa | Mahaska | — | 20:10 local · NCEI |
| Apr 14, 2012 | 1.00 inquarter | 1.25 WNW Oskaloosa | Mahaska | $50K | 20:07 local · NCEI |
| Jun 5, 2011 | 1.75 ingolf ball | 0.86 SE Oskaloosa | Mahaska | $5K | 03:45 local · NCEI |
Hail history near Oskaloosa
Questions about hail in Oskaloosa
How often does it hail in Oskaloosa, Iowa?
24 hail reports have been logged in and within about 5 km (3 miles) of Oskaloosa since 1980. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #119 of 483 Iowa places by number of reports.
When is hail season in Oskaloosa?
Most reports come in May, June, April. May alone accounts for 29% of all reports.
What is the largest hail recorded in Oskaloosa?
2.75 in (baseball size) on June 15, 2017 near 1.37 NNE Givin. 8% of reports here were 2 inches or larger.
When did it last hail in Oskaloosa?
The most recent report in this data is from July 17, 2023 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Oskaloosa had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 2 reports. The most recent was July 17, 2023.
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.