Hail history for Grinnell, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Grinnell since 1960, with preliminary reports to November 3, 2026.
Readout · Grinnell
- Last hail
- Oct 24, 2024
- 0.88 in, nickel size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 6 reports
- Largest ever
- 3.00 in
- teacup · May 10, 2003
35 reports on 24 days since 1960 · #53 of 483 Iowa places
Hail map · Grinnell
- 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 Grinnell
The latest hail report in and around Grinnell is from October 24, 2024, 0.88 in (nickel size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 2.75 in on May 7, 2023.
Over the 20 years 2006–2025, Grinnell logged 16 reports on 13 hail days, about 0.8 reports a year. That is 78% more than the median Iowa town on this site (0.5 a year) and ranks #53 of 483 Iowa cities and towns on this site for all-time reports. Grinnell accounts for 38% of the 93 reports filed in Poweshiek County.
14% 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 3.00 in (teacup) on May 10, 2003 near Grinnell.
Reports held about level in 2016–2025 (8) compared with 2006–2015 (8). The busiest year was 2003, with 8 reports on 2 days. Hail here peaks in May (31% of reports); 66% fall between April and June.
Reports a year 2006–2025 average
- Grinnell 0.8
- Poweshiek County 2.3
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Grinnell 13
- Poweshiek County 29
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Grinnell 14%
- Poweshiek County 12%
- 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 | 2 | ||||||||||
| 2023 | 3 | 3 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Oct 24, 2024 | 1 | 0.88 in | — |
| Aug 15, 2024 | 1 | 0.75 in | — |
| May 7, 2023 | 3 | 2.75 in | — |
| Aug 27, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| May 10, 2003 | 3.00 inteacup | Grinnell | Poweshiek | $50K | 16:50 local · NCEI |
| May 7, 2023 | 2.75 inbaseball | 2.07 SW Grinnell Arpt | Poweshiek | — | 15:40 local · NCEI |
| May 10, 2003 | 2.75 inbaseball | Grinnell | Poweshiek | $50K | 16:45 local · NCEI |
| May 10, 2003 | 2.50 intennis ball | Grinnell Arpt | Poweshiek | $50K | 16:50 local · NCEI |
| May 10, 2003 | 2.00 inhen egg | Grinnell | Poweshiek | $50K | 16:40 local · NCEI |
Size of every report
- Under 1 in 12 34%
- 1–2 in 18 51%
- 2 in + 5 14%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Oct 24, 2024 | 0.88 innickel | 0.86 SE Grinnell | Poweshiek | — | 14:30 local · NCEI |
| Aug 15, 2024 | 0.75 inpenny | 1.55 E Grinnell Arpt | Poweshiek | — | 17:00 local · NCEI |
| May 7, 2023 | 1.50 inping pong ball | 0.69 N Grinnell | Poweshiek | — | 15:45 local · NCEI |
| May 7, 2023 | 1.75 ingolf ball | Grinnell | Poweshiek | — | 15:42 local · NCEI |
| May 7, 2023 | 2.75 inbaseball | 2.07 SW Grinnell Arpt | Poweshiek | — | 15:40 local · NCEI |
| Aug 27, 2022 | 1.00 inquarter | 1.55 W Grinnell Arpt | Poweshiek | — | 15:32 local · NCEI |
| Jun 20, 2021 | 1.25 inhalf dollar | 3.73 SW Grinnell Arpt | Poweshiek | — | 16:41 local · NCEI |
| Apr 15, 2017 | 1.00 inquarter | 2.92 SW Grinnell Arpt | Poweshiek | — | 18:36 local · NCEI |
| Jul 6, 2014 | 1.00 inquarter | 1.19 SW Grinnell | Poweshiek | $3K | 20:10 local · NCEI |
| Apr 12, 2014 | 1.00 inquarter | 2.07 SW Grinnell Arpt | Poweshiek | $1K | 22:18 local · NCEI |
| Jun 29, 2012 | 1.25 inhalf dollar | 1 SSE Grinnell Arpt | Poweshiek | $2K | 15:33 local · NCEI |
| Apr 6, 2010 | 1.50 inping pong ball | 0.86 SE Grinnell | Poweshiek | $500K6 injured | 17:02 local · NCEI |
Hail history near Grinnell
Questions about hail in Grinnell
How often does it hail in Grinnell, Iowa?
35 hail reports have been logged in and within about 5 km (3 miles) of Grinnell since 1960. Over the 20 years 2006–2025 that averages 0.8 reports a year. That ranks #53 of 483 Iowa places by number of reports.
When is hail season in Grinnell?
Most reports come in May, June, April. May alone accounts for 31% of all reports.
What is the largest hail recorded in Grinnell?
3.00 in (teacup size) on May 10, 2003 near Grinnell. 14% of reports here were 2 inches or larger.
When did it last hail in Grinnell?
The most recent report in this data is from October 24, 2024 (0.88 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Grinnell had in the last five years?
4 separate days with hail reports since November 3, 2021, adding up to 6 reports. The most recent was October 24, 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.