Hail history for Sioux County, Iowa
Every NOAA hail report filed in Sioux County since 1961, with preliminary National Weather Service reports to November 3, 2026.
Readout · Sioux County
- Last hail
- Oct 8, 2026
- 1.00 in, quarter size · preliminary
- Hail days, last 5 years
- 16
- since Nov 3, 2021 · 33 reports
- Largest ever
- 2.75 in
- baseball · Aug 7, 1984
269 reports on 135 days since 1961 · #9 of 100 Iowa counties
Hail map · Sioux 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 Sioux County
The latest hail report in Sioux County is from October 8, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 16 separate hail days; the biggest stones in that time were 2.50 in on August 18, 2022.
Over the 20 years 2006–2025, Sioux County logged 136 reports on 66 hail days, about 6.8 reports a year. That is 84% more than the median Iowa county (3.7 a year) and ranks #9 of 100 Iowa counties for all-time reports. Sioux County holds 2% of all 16,032 hail reports in Iowa.
6% 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 2.75 in (baseball) on August 7, 1984.
Reports were down 44% in 2016–2025 (49) compared with 2006–2015 (87). The busiest year was 2001, with 25 reports on 8 days. Hail here peaks in June (26% of reports); 47% fall between April and June.
Reports a year 2006–2025 average
- Sioux County 6.8
- Median Iowa county 3.7
Hail days 2006–2025
- Sioux County 66
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Sioux County 6%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 3 | 1 | 7 | 13 | ||||||||
| 2025 | 6 | 2 | 8 | ||||||||||
| 2024 | 1 | 1 | 2 | ||||||||||
| 2023 | 1 | 1 | 4 | 6 | |||||||||
| 2022 | 1 | 3 | 4 | ||||||||||
| 2021 | 2 | 2 | 4 | ||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 3 | 3 | |||||||||||
| 2018 | 3 | 8 | 11 | ||||||||||
| 2017 | 4 | 1 | 5 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Oct 8, 2026 | 7 | 1.75 in | View |
| Sep 1, 2026 | 1 | 1.00 in | View |
| Jun 28, 2026 | 3 | 1.50 in | — |
| May 18, 2026 | 1 | 1.00 in | — |
| May 17, 2026 | 1 | 0.75 in | — |
| Sep 21, 2025 | 2 | 1.75 in | — |
| Jun 14, 2025 | 1 | 1.00 in | — |
| Jun 2, 2025 | 5 | 1.75 in | — |
| Jul 30, 2024 | 1 | 0.75 in | — |
| Jun 2, 2024 | 1 | 1.25 in | — |
| Jul 10, 2023 | 2 | 1.50 in | — |
| Jul 3, 2023 | 2 | 1.00 in | — |
| May 31, 2023 | 1 | 0.88 in | — |
| Apr 19, 2023 | 1 | 1.00 in | — |
| Aug 18, 2022 | 3 | 2.50 in | — |
| Jul 22, 2022 | 1 | 0.75 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 7, 1984 | 2.75 inbaseball | — | 14:22 local · NCEI |
| Sep 5, 1983 | 2.75 inbaseball | — | 16:30 local · NCEI |
| Sep 3, 1980 | 2.75 inbaseball | — | 18:05 local · NCEI |
| Jul 5, 1978 | 2.75 inbaseball | — | 17:30 local · NCEI |
| Aug 21, 1975 | 2.75 inbaseball | — | 16:30 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 98 37%
- 1–2 in 155 58%
- 2 in + 15 6%
- No size 1
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Oct 8, 2026 | 1.00 inquarter | 4 S Granville | 07:01 UTC · NWS prelim. |
| Oct 8, 2026 | 1.00 inquarter | Hawarden | 05:47 UTC · NWS prelim. |
| Oct 8, 2026 | 1.75 ingolf ball | 2 S Maurice | 03:13 UTC · NWS prelim. |
| Oct 8, 2026 | 1.50 inping pong ball | Ireton | 03:05 UTC · NWS prelim. |
| Oct 8, 2026 | 1.50 inping pong ball | 5 SW Granville | 02:50 UTC · NWS prelim. |
| Oct 8, 2026 | 1.00 inquarter | Orange City | 02:37 UTC · NWS prelim. |
| Oct 8, 2026 | 1.00 inquarter | 2 S Sioux Center | 02:26 UTC · NWS prelim. |
| Sep 1, 2026 | 1.00 inquarter | 2 NNW Orange City | 03:18 UTC · NWS prelim. |
| Jun 28, 2026 | 1.00 inquarter | 1.66 ENE Hull | 04:35 local · NCEI |
| Jun 28, 2026 | 1.50 inping pong ball | 1.47 NNW Hull | 04:28 local · NCEI |
| Jun 28, 2026 | 0.75 inpenny | Rock Vly | 04:24 local · NCEI |
| May 18, 2026 | 1.00 inquarter | 1.23 SW Chatsworth | 16:00 local · NCEI |
Cities and towns in Sioux County
| Place | Reports | Largest |
|---|---|---|
| Rock Valley | 34 | 1.75 in |
| Sioux Center | 27 | 2.75 in |
| Hawarden | 26 | 2.00 in |
| Alton | 21 | 1.75 in |
| Orange City | 18 | 1.75 in |
| Hospers | 17 | 1.75 in |
| Chatsworth | 15 | 2.75 in |
| Boyden | 13 | 2.50 in |
| Hull | 12 | 2.00 in |
| Granville | 11 | 2.00 in |
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 |
|---|---|---|---|
| Ireton | 7 | 6 | Oct 8, 2026 |
| Maurice | 6 | 6 | Oct 8, 2026 |
| Struble | 6 | 5 | Sep 21, 2025 |
| Matlock | 4 | 4 | Jul 10, 2023 |
Questions about hail in Sioux County
How often does it hail in Sioux County, Iowa?
269 hail reports have been logged in Sioux County since 1961. Over the 20 years 2006–2025 that averages 6.8 reports a year. That ranks #9 of 100 Iowa counties by number of reports.
When is hail season in Sioux County?
Most reports come in June, July, August. June alone accounts for 26% of all reports.
What is the largest hail recorded in Sioux County?
2.75 in (baseball size) on August 7, 1984. 6% of reports here were 2 inches or larger.
When did it last hail in Sioux County?
The most recent report in this data is from October 8, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Sioux County had in the last five years?
16 separate days with hail reports since November 3, 2021, adding up to 33 reports. The most recent was October 8, 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.