Hail history for Monona County, Iowa
Every NOAA hail report filed in Monona County since 1958, with preliminary National Weather Service reports to November 5, 2026.
Readout · Monona County
- Last hail
- Mar 6, 2026
- 1.50 in, ping pong ball size
- Hail days, last 5 years
- 6
- since Nov 5, 2021 · 10 reports
- Largest ever
- 3.50 in
- teacup · Jun 12, 2024
144 reports on 96 days since 1958 · #47 of 100 Iowa counties
Hail map · Monona 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 Monona County
The latest hail report in Monona County is from March 6, 2026, 1.50 in (ping pong ball size). Since November 5, 2021 there have been 6 separate hail days; the biggest stones in that time were 3.50 in on June 12, 2024.
Over the 20 years 2006–2025, Monona County logged 62 reports on 45 hail days, about 3.1 reports a year. That is 16% less than the median Iowa county (3.7 a year) and ranks #47 of 100 Iowa counties for all-time reports. Monona County holds 1% of all 16,032 hail reports in Iowa.
10% 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 3.50 in (teacup) on June 12, 2024 near 3 W Onawa.
Reports were down 49% in 2016–2025 (21) compared with 2006–2015 (41). The busiest year was 2001, with 11 reports on 6 days. Hail here peaks in June (22% of reports); 58% fall between April and June.
Reports a year 2006–2025 average
- Monona County 3.1
- Median Iowa county 3.7
Hail days 2006–2025
- Monona County 45
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Monona County 10%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | |||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 3 | 4 | ||||||||||
| 2023 | 3 | 1 | 4 | ||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 2 | 1 | 3 | ||||||||||
| 2018 | 1 | 1 | |||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 5, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Mar 6, 2026 | 1 | 1.50 in | — |
| Jun 12, 2024 | 3 | 3.50 in | — |
| May 21, 2024 | 1 | 1.00 in | — |
| May 8, 2023 | 1 | 1.00 in | — |
| Apr 19, 2023 | 3 | 1.50 in | — |
| May 19, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 12, 2024 | 3.50 inteacup | 3 W Onawa | 18:31 local · NCEI |
| Aug 5, 2000 | 3.00 inteacup | 6 E Blencoe | 17:45 local · NCEI |
| Jun 12, 2024 | 2.75 inbaseball | Whiting | 18:14 local · NCEI |
| May 12, 2011 | 2.75 inbaseball | 1.38 N Ticonic | 17:17 local · NCEI |
| May 12, 2011 | 2.75 inbaseball | 1.02 W Whiting | 16:52 local · NCEI |
Size of every report
- Under 1 in 51 35%
- 1–2 in 79 55%
- 2 in + 14 10%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Mar 6, 2026 | 1.50 inping pong ball | 1.03 W Blencoe | 20:40 local · NCEI |
| Jun 12, 2024 | 3.50 inteacup | 3 W Onawa | 18:31 local · NCEI |
| Jun 12, 2024 | 2.75 inbaseball | Whiting | 18:14 local · NCEI |
| Jun 12, 2024 | 1.75 ingolf ball | 3 W Whiting | 17:51 local · NCEI |
| May 21, 2024 | 1.00 inquarter | Blencoe | 12:25 local · NCEI |
| May 8, 2023 | 1.00 inquarter | 0.51 E Mapleton | 18:29 local · NCEI |
| Apr 19, 2023 | 1.00 inquarter | Ute | 18:00 local · NCEI |
| Apr 19, 2023 | 1.50 inping pong ball | 0.51 W Blencoe | 17:28 local · NCEI |
| Apr 19, 2023 | 1.00 inquarter | 4.15 S Turin | 17:10 local · NCEI |
| May 19, 2022 | 1.00 inquarter | 6.3 ENE Mapleton Muni Arpt | 22:28 local · NCEI |
| Jul 9, 2021 | 1.50 inping pong ball | 0.51 E Onawa | 00:09 local · NCEI |
| Jun 2, 2020 | 1.00 inquarter | 4.32 ENE Mapleton Muni Arpt | 20:45 local · NCEI |
Cities and towns in Monona 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 |
|---|---|---|---|
| Castana | 8 | 7 | Jun 20, 2008 |
| Moorhead | 7 | 6 | Aug 6, 2011 |
| Ute | 6 | 6 | Apr 19, 2023 |
| Turin | 4 | 4 | Jun 20, 2019 |
| Rodney | 2 | 2 | May 12, 2011 |
Questions about hail in Monona County
How often does it hail in Monona County, Iowa?
144 hail reports have been logged in Monona County since 1958. Over the 20 years 2006–2025 that averages 3.1 reports a year. That ranks #47 of 100 Iowa counties by number of reports.
When is hail season in Monona County?
Most reports come in June, May, April. June alone accounts for 22% of all reports.
What is the largest hail recorded in Monona County?
3.50 in (teacup size) on June 12, 2024 near 3 W Onawa. 10% of reports here were 2 inches or larger.
When did it last hail in Monona County?
The most recent report in this data is from March 6, 2026 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 5, 2026.
How many hail storms has Monona County had in the last five years?
6 separate days with hail reports since November 5, 2021, adding up to 10 reports. The most recent was March 6, 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.