Hail history for Marengo, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Marengo since 1971, with preliminary reports to November 3, 2026.
Readout · Marengo
- Last hail
- May 7, 2023
- 1.00 in, quarter size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 3 reports
- Largest ever
- 1.75 in
- golf ball · Jun 20, 1974
17 reports on 14 days since 1971 · #222 of 483 Iowa places
Hail map · Marengo
- 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 Marengo is from May 7, 2023. A local roofer can check and document it at no cost.
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What the record says about Marengo
The latest hail report in and around Marengo is from May 7, 2023, 1.00 in (quarter size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.50 in on May 7, 2023.
Over the 20 years 2006–2025, Marengo logged 13 reports on 10 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 #222 of 483 Iowa cities and towns on this site for all-time reports. Marengo accounts for 13% of the 128 reports filed in Iowa County.
0% 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 1.75 in (golf ball) on June 20, 1974.
Reports held about level in 2016–2025 (6) compared with 2006–2015 (7). The busiest year was 2023, with 3 reports on 1 day. Hail here peaks in May (35% of reports); 76% fall between April and June.
Reports a year 2006–2025 average
- Marengo 0.7
- Iowa County 4.3
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Marengo 10
- Iowa County 46
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Marengo 0%
- Iowa County 4%
- 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 | 3 | 3 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 1 | 2 | ||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 7, 2023 | 3 | 1.50 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 20, 1974 | 1.75 ingolf ball | — | Iowa | 17:30 local · NCEI |
| Aug 10, 1971 | 1.75 ingolf ball | — | Iowa | 13:45 local · NCEI |
| May 7, 2023 | 1.50 inping pong ball | 3.45 N Marengo | Iowa | 15:32 local · NCEI |
| May 7, 2023 | 1.00 inquarter | 0.86 SW Marengo | Iowa | 15:35 local · NCEI |
| May 7, 2023 | 1.00 inquarter | 1.38 S Marengo | Iowa | 15:35 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 41%
- 1–2 in 10 59%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| May 7, 2023 | 1.00 inquarter | 0.86 SW Marengo | Iowa | 15:35 local · NCEI |
| May 7, 2023 | 1.00 inquarter | 1.38 S Marengo | Iowa | 15:35 local · NCEI |
| May 7, 2023 | 1.50 inping pong ball | 3.45 N Marengo | Iowa | 15:32 local · NCEI |
| May 29, 2019 | 0.88 innickel | 2.06 W West Amana | Iowa | 18:24 local · NCEI |
| Jun 9, 2018 | 0.75 inpenny | 3.49 N Marengo | Iowa | 05:36 local · NCEI |
| May 26, 2018 | 1.00 inquarter | 2.31 SSW Marengo | Iowa | 00:09 local · NCEI |
| Jun 22, 2013 | 0.75 inpenny | Marengo | Iowa | 05:59 local · NCEI |
| Apr 3, 2011 | 1.00 inquarter | 1.38 S Marengo | Iowa | 17:17 local · NCEI |
| Apr 3, 2011 | 0.75 inpenny | 1.38 S Marengo | Iowa | 17:14 local · NCEI |
| Jun 21, 2009 | 1.00 inquarter | Marengo | Iowa | 19:00 local · NCEI |
| Mar 31, 2008 | 0.88 innickel | 2 N Marengo | Iowa | 16:59 local · NCEI |
| Mar 31, 2007 | 0.88 innickel | Marengo | Iowa | 14:49 local · NCEI |
Hail history near Marengo
- Ladora 11 km · 12
- Williamsburg 15 km · 14
- Norway 17 km · 17
- Belle Plaine 20 km · 29
- Victor 20 km · 13
- Walford 22 km · 11
- Van Horne 24 km · 24
- Keystone 25 km · 14
Questions about hail in Marengo
How often does it hail in Marengo, Iowa?
17 hail reports have been logged in and within about 5 km (3 miles) of Marengo since 1971. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #222 of 483 Iowa places by number of reports.
When is hail season in Marengo?
Most reports come in May, June, April. May alone accounts for 35% of all reports.
What is the largest hail recorded in Marengo?
1.75 in (golf ball size) on June 20, 1974. 0% of reports here were 2 inches or larger.
When did it last hail in Marengo?
The most recent report in this data is from May 7, 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 Marengo had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 3 reports. The most recent was May 7, 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.