Hail history for Denison, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Denison since 1956, with preliminary reports to November 3, 2026.
Readout · Denison
- Last hail
- May 14, 2018
- 1.00 in, quarter size
- Hail days, last 5 years
- 0
- since Nov 3, 2021 · 0 reports
- Largest ever
- 2.00 in
- hen egg · Apr 26, 1984
29 reports on 22 days since 1956 · #79 of 483 Iowa places
Hail map · Denison
- 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 Denison is from May 14, 2018. A local roofer can check and document it at no cost.
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What the record says about Denison
The latest hail report in and around Denison is from May 14, 2018, 1.00 in (quarter size). There has been no hail report here in the five years since November 3, 2021.
Over the 20 years 2006–2025, Denison logged 7 reports on 6 hail days, about 0.3 reports a year. That is 22% less than the median Iowa town on this site (0.5 a year) and ranks #79 of 483 Iowa cities and towns on this site for all-time reports. Denison accounts for 19% of the 149 reports filed in Crawford County.
7% 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 2.00 in (hen egg) on April 26, 1984.
The busiest year was 2001, with 8 reports on 3 days. Hail here peaks in May (41% of reports); 66% fall between April and June.
Reports a year 2006–2025 average
- Denison 0.3
- Crawford County 2.7
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Denison 6
- Crawford County 35
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Denison 7%
- Crawford 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 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 1 | 2 | 3 | ||||||||||
| 2017 | 0 |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Apr 26, 1984 | 2.00 inhen egg | — | Crawford | — | 16:00 local · NCEI |
| May 28, 1956 | 2.00 inhen egg | — | Crawford | — | 21:18 local · NCEI |
| Jul 28, 2008 | 1.75 ingolf ball | Denison | Crawford | $50K | 05:46 local · NCEI |
| Aug 17, 2001 | 1.75 ingolf ball | Cumberland | Cass | $10K | 20:50 local · NCEI |
| Aug 17, 2001 | 1.75 ingolf ball | 3 NW Atlantic | Cass | $7K | 20:28 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 9 31%
- 1–2 in 18 62%
- 2 in + 2 7%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| May 14, 2018 | 1.00 inquarter | 0.51 W Denison | Crawford | — | 01:33 local · NCEI |
| May 14, 2018 | 1.25 inhalf dollar | 0.51 W Denison | Crawford | — | 01:30 local · NCEI |
| Apr 13, 2018 | 0.88 innickel | Denison | Crawford | — | 14:50 local · NCEI |
| Jul 17, 2016 | 0.88 innickel | 3.08 E Denison | Crawford | — | 19:34 local · NCEI |
| May 12, 2011 | 0.75 inpenny | 3.77 NW Denison Muni Arpt | Crawford | — | 19:49 local · NCEI |
| Jul 28, 2008 | 1.75 ingolf ball | Denison | Crawford | $50K | 05:46 local · NCEI |
| May 8, 2006 | 0.88 innickel | 5 E Lake City | Calhoun | $1K | 21:30 local · NCEI |
| Oct 1, 2002 | 0.88 innickel | Denison | Crawford | $3K | 18:30 local · NCEI |
| Jun 20, 2002 | 0.75 inpenny | Denison | Crawford | — | 21:15 local · NCEI |
| Aug 17, 2001 | 1.00 inquarter | 14 NW Corning | Adams | $3K | 21:05 local · NCEI |
| Aug 17, 2001 | 1.75 ingolf ball | Cumberland | Cass | $10K | 20:50 local · NCEI |
| Aug 17, 2001 | 1.75 ingolf ball | 3 NW Atlantic | Cass | $7K | 20:28 local · NCEI |
Hail history near Denison
Questions about hail in Denison
How often does it hail in Denison, Iowa?
29 hail reports have been logged in and within about 5 km (3 miles) of Denison since 1956. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #79 of 483 Iowa places by number of reports.
When is hail season in Denison?
Most reports come in May, July, June. May alone accounts for 41% of all reports.
What is the largest hail recorded in Denison?
2.00 in (hen egg size) on April 26, 1984. 7% of reports here were 2 inches or larger.
When did it last hail in Denison?
The most recent report in this data is from May 14, 2018 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Denison had in the last five years?
None: there has been no hail report in and within about 5 km (3 miles) of Denison since November 3, 2021. The last one was on May 14, 2018.
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.