Hail history for Onawa, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Onawa since 1974, with preliminary reports to November 3, 2026.
Readout · Onawa
- Last hail
- Jun 12, 2024
- 3.50 in, teacup size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 1 report
- Largest ever
- 3.50 in
- teacup · Jun 12, 2024
23 reports on 22 days since 1974 · #127 of 483 Iowa places
Hail map · Onawa
- 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 Onawa is from June 12, 2024. A local roofer can check and document it at no cost.
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What the record says about Onawa
The latest hail report in and around Onawa is from June 12, 2024, 3.50 in (teacup size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 3.50 in on June 12, 2024.
Over the 20 years 2006–2025, Onawa logged 13 reports on 12 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 #127 of 483 Iowa cities and towns on this site for all-time reports. Onawa accounts for 16% of the 144 reports filed in Monona County.
4% 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 3.50 in (teacup) on June 12, 2024 near 3 W Onawa.
Reports were down 38% in 2016–2025 (5) compared with 2006–2015 (8). The busiest year was 2012, with 3 reports on 2 days. Hail here peaks in May (30% of reports); 57% fall between April and June.
Reports a year 2006–2025 average
- Onawa 0.7
- Monona County 3.1
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Onawa 12
- Monona County 45
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Onawa 4%
- Monona County 10%
- 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 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 12, 2024 | 1 | 3.50 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 12, 2024 | 3.50 inteacup | 3 W Onawa | Monona | 18:31 local · NCEI |
| Jul 7, 2016 | 1.75 ingolf ball | 2.81 N Blencoe | Monona | 15:40 local · NCEI |
| Jul 11, 1992 | 1.75 ingolf ball | — | Monona | 19:45 local · NCEI |
| Jun 14, 1980 | 1.75 ingolf ball | — | Monona | 19:00 local · NCEI |
| Aug 13, 1976 | 1.75 ingolf ball | — | Monona | 20:50 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 7 30%
- 1–2 in 15 65%
- 2 in + 1 4%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 12, 2024 | 3.50 inteacup | 3 W Onawa | Monona | 18:31 local · NCEI |
| Jul 9, 2021 | 1.50 inping pong ball | 0.51 E Onawa | Monona | 00:09 local · NCEI |
| Sep 14, 2019 | 0.88 innickel | 0.51 E Onawa | Monona | 08:09 local · NCEI |
| Mar 6, 2017 | 0.88 innickel | 0.51 E Onawa | Monona | 14:36 local · NCEI |
| Jul 7, 2016 | 1.75 ingolf ball | 2.81 N Blencoe | Monona | 15:40 local · NCEI |
| May 23, 2012 | 1.00 inquarter | 4 S Onawa | Monona | 17:36 local · NCEI |
| May 19, 2012 | 1.00 inquarter | 0.86 NE Onawa | Monona | 18:25 local · NCEI |
| May 19, 2012 | 1.00 inquarter | 0.51 E Onawa | Monona | 18:05 local · NCEI |
| Aug 18, 2011 | 1.25 inhalf dollar | 0.51 E Onawa | Monona | 16:54 local · NCEI |
| Apr 9, 2011 | 1.00 inquarter | 0.51 E Onawa | Monona | 23:19 local · NCEI |
| Feb 26, 2009 | 0.75 inpenny | 0.51 E Onawa | Monona | 08:47 local · NCEI |
| Aug 22, 2007 | 0.88 innickel | 2.57 E Onawa | Monona | 06:55 local · NCEI |
Hail history near Onawa
- Blencoe 11 km · 18
- Whiting 12 km · 16
- Hornick 23 km · 15
- Little Sioux 25 km · 19
- River Sioux 25 km · 12
- Sloan 26 km · 15
- Smithland 26 km · 11
- Soldier 26 km · 10
Questions about hail in Onawa
How often does it hail in Onawa, Iowa?
23 hail reports have been logged in and within about 5 km (3 miles) of Onawa since 1974. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #127 of 483 Iowa places by number of reports.
When is hail season in Onawa?
Most reports come in May, June, July. May alone accounts for 30% of all reports.
What is the largest hail recorded in Onawa?
3.50 in (teacup size) on June 12, 2024 near 3 W Onawa. 4% of reports here were 2 inches or larger.
When did it last hail in Onawa?
The most recent report in this data is from June 12, 2024 (3.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Onawa had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was June 12, 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.