Hail history for Garrison, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Garrison since 1998, with preliminary reports to November 3, 2026.
Readout · Garrison
- Last hail
- Mar 31, 2023
- 1.00 in, quarter size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 1 report
- Largest ever
- 1.75 in
- golf ball · Apr 13, 2006
14 reports on 10 days since 1998 · #287 of 483 Iowa places
Hail map · Garrison
- 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 Garrison is from March 31, 2023. A local roofer can check and document it at no cost.
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What the record says about Garrison
The latest hail report in and around Garrison is from March 31, 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 March 31, 2023.
Over the 20 years 2006–2025, Garrison logged 10 reports on 6 hail days, about 0.5 reports a year. That is 11% more than the median Iowa town on this site (0.5 a year) and ranks #287 of 483 Iowa cities and towns on this site for all-time reports. Garrison accounts for 5% of the 278 reports filed in Benton 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 April 13, 2006 near 3 SE Garrison.
Reports were down 89% in 2016–2025 (1) compared with 2006–2015 (9). The busiest year was 2006, with 5 reports on 1 day. Hail here peaks in April (57% of reports); 71% fall between April and June.
Reports a year 2006–2025 average
- Garrison 0.5
- Benton County 8.9
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Garrison 6
- Benton County 75
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Garrison 0%
- Benton 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 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Mar 31, 2023 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Apr 13, 2006 | 1.75 ingolf ball | 3 SE Garrison | Benton | $7K | 18:32 local · NCEI |
| Apr 13, 2006 | 1.75 ingolf ball | 7 SW Vinton | Benton | — | 18:29 local · NCEI |
| May 10, 2003 | 1.75 ingolf ball | 1 N Garrison | Benton | $500K | 16:20 local · NCEI |
| Mar 30, 1998 | 1.75 ingolf ball | 4 W Vinton | Benton | — | 14:09 local · NCEI |
| Apr 19, 2000 | 1.50 inping pong ball | 2 N Garrison | Benton | — | 19:29 local · NCEI |
Size of every report
- Under 1 in 5 36%
- 1–2 in 9 64%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Mar 31, 2023 | 1.00 inquarter | 0.86 SE Garrison | Benton | — | 15:30 local · NCEI |
| Jun 18, 2010 | 0.75 inpenny | 1.69 WSW Garrison | Benton | — | 16:47 local · NCEI |
| Apr 6, 2010 | 0.75 inpenny | 0.86 NW Garrison | Benton | — | 17:26 local · NCEI |
| Feb 26, 2009 | 1.00 inquarter | 2.81 S Garrison | Benton | — | 13:15 local · NCEI |
| Aug 27, 2007 | 0.75 inpenny | 0.86 SE Garrison | Benton | — | 08:17 local · NCEI |
| Apr 13, 2006 | 1.75 ingolf ball | 3 SE Garrison | Benton | $7K | 18:32 local · NCEI |
| Apr 13, 2006 | 1.00 inquarter | 3 S Garrison | Benton | $4K | 18:29 local · NCEI |
| Apr 13, 2006 | 1.75 ingolf ball | 7 SW Vinton | Benton | — | 18:29 local · NCEI |
| Apr 13, 2006 | 0.75 inpenny | 3 SE Garrison | Benton | — | 18:22 local · NCEI |
| Apr 13, 2006 | 1.00 inquarter | 2 W Garrison | Benton | $1K | 18:07 local · NCEI |
| May 10, 2003 | 1.75 ingolf ball | 1 N Garrison | Benton | $500K | 16:20 local · NCEI |
| Apr 8, 2001 | 0.88 innickel | Garrison | Benton | — | 20:46 local · NCEI |
Hail history near Garrison
- Vinton 10 km · 39
- Mount Auburn 13 km · 10
- Van Horne 16 km · 24
- Keystone 17 km · 14
- La Porte City 19 km · 10
- Urbana 23 km · 22
- Shellsburg 23 km · 17
- Traer 27 km · 19
Questions about hail in Garrison
How often does it hail in Garrison, Iowa?
14 hail reports have been logged in and within about 5 km (3 miles) of Garrison since 1998. Over the 20 years 2006–2025 that averages 0.5 reports a year. That ranks #287 of 483 Iowa places by number of reports.
When is hail season in Garrison?
Most reports come in April, March, February. April alone accounts for 57% of all reports.
What is the largest hail recorded in Garrison?
1.75 in (golf ball size) on April 13, 2006 near 3 SE Garrison. 0% of reports here were 2 inches or larger.
When did it last hail in Garrison?
The most recent report in this data is from March 31, 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 Garrison 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 March 31, 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.