Hail history for Grant County, South Dakota
Every NOAA hail report filed in Grant County since 1957, with preliminary National Weather Service reports to November 3, 2026.
Readout · Grant County
- Last hail
- Jul 6, 2026
- 0.75 in, penny size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 6 reports
- Largest ever
- 2.75 in
- baseball · Aug 28, 2021
129 reports on 74 days since 1957 · #58 of 67 South Dakota counties
Hail map · Grant 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 Grant County
The latest hail report in Grant County is from July 6, 2026, 0.75 in (penny size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 1.00 in on August 21, 2025.
Over the 20 years 2006–2025, Grant County logged 83 reports on 34 hail days, about 4.2 reports a year. That is 25% less than the median South Dakota county (5.5 a year) and ranks #58 of 67 South Dakota counties for all-time reports. Grant County holds 1% of all 17,223 hail reports in South Dakota.
5% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median South Dakota county. The largest hail on record here is 2.75 in (baseball) on August 28, 2021 near 5.74 ENE Hiland.
Reports were down 59% in 2016–2025 (24) compared with 2006–2015 (59). The busiest year was 2007, with 14 reports on 3 days. Hail here peaks in June (29% of reports); 40% fall between April and June.
Reports a year 2006–2025 average
- Grant County 4.2
- Median South Dakota county 5.5
Hail days 2006–2025
- Grant County 34
- Median South Dakota county 54
Share 2 in or larger of sized reports
- Grant County 5%
- Median South Dakota county 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | |||||||||||
| 2025 | 3 | 3 | |||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 5 | 5 | |||||||||||
| 2020 | 3 | 1 | 4 | ||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 2 | 2 | |||||||||||
| 2017 | 2 | 5 | 7 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jul 6, 2026 | 1 | 0.75 in | — |
| Aug 21, 2025 | 3 | 1.00 in | — |
| Jun 18, 2024 | 1 | 1.00 in | — |
| Sep 8, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 28, 2021 | 2.75 inbaseball | 5.74 ENE Hiland | 05:50 local · NCEI |
| Aug 14, 1957 | 2.75 inbaseball | — | 19:30 local · NCEI |
| Aug 28, 2021 | 2.50 intennis ball | 3.68 NW Milbank | 08:15 local · NCEI |
| Jul 17, 2015 | 2.00 inhen egg | 5.69 NE Hiland | 19:30 local · NCEI |
| Aug 6, 1966 | 2.00 inhen egg | — | 12:00 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 46 36%
- 1–2 in 77 60%
- 2 in + 6 5%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 6, 2026 | 0.75 inpenny | 2.01 NE Twin Brooks | 22:12 local · NCEI |
| Aug 21, 2025 | 1.00 inquarter | 0.49 W Milbank | 19:38 local · NCEI |
| Aug 21, 2025 | 0.75 inpenny | Milbank | 19:33 local · NCEI |
| Aug 21, 2025 | 1.00 inquarter | 2.06 WNW Big Stone City | 19:04 local · NCEI |
| Jun 18, 2024 | 1.00 inquarter | 2.07 S Troy | 15:36 local · NCEI |
| Sep 8, 2022 | 1.00 inquarter | 0.98 E Strandburg | 21:00 local · NCEI |
| Aug 28, 2021 | 1.25 inhalf dollar | Big Stone City | 08:35 local · NCEI |
| Aug 28, 2021 | 1.75 ingolf ball | 0.49 W Milbank | 08:19 local · NCEI |
| Aug 28, 2021 | 2.50 intennis ball | 3.68 NW Milbank | 08:15 local · NCEI |
| Aug 28, 2021 | 1.25 inhalf dollar | 2.43 W Milbank | 06:33 local · NCEI |
| Aug 28, 2021 | 2.75 inbaseball | 5.74 ENE Hiland | 05:50 local · NCEI |
| Oct 11, 2020 | 1.00 inquarter | 0.85 SE Revillo | 16:45 local · NCEI |
Cities and towns in Grant County
| Place | Reports | Largest |
|---|---|---|
| Milbank | 39 | 2.50 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 |
|---|---|---|---|
| Twin Brooks | 9 | 9 | Jul 6, 2026 |
| Big Stone City | 6 | 4 | Aug 21, 2025 |
| Corona | 4 | 3 | May 30, 2022 |
| Marvin | 4 | 4 | Jul 22, 2011 |
| Revillo | 4 | 4 | Oct 11, 2020 |
| Stockholm | 4 | 3 | Apr 21, 2007 |
| Albee | 3 | 3 | Aug 18, 2017 |
| Strandburg | 3 | 3 | Sep 8, 2022 |
| La Bolt | 1 | 1 | Jul 21, 1981 |
Questions about hail in Grant County
How often does it hail in Grant County, South Dakota?
129 hail reports have been logged in Grant County since 1957. Over the 20 years 2006–2025 that averages 4.2 reports a year. That ranks #58 of 67 South Dakota counties by number of reports.
When is hail season in Grant County?
Most reports come in June, August, July. June alone accounts for 29% of all reports.
What is the largest hail recorded in Grant County?
2.75 in (baseball size) on August 28, 2021 near 5.74 ENE Hiland. 5% of reports here were 2 inches or larger.
When did it last hail in Grant County?
The most recent report in this data is from July 6, 2026 (0.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Grant County 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 July 6, 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.