Minnehaha County, South Dakota Hail Map & History
Minnehaha County was hit as recently as 2026-08-20, 25 days ago. Minnehaha County is hit in most years, often more than once. The largest stone on record here is 3.5 inches and 3.5 times the National Weather Service's 1 inch severe criterion, reported on 2021-08-05 near Sioux Falls.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in South Dakota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-08-20, around Humboldt. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Minnehaha County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->How often it hails in Minnehaha County
NOAA's Storm Prediction Center has logged 38 separate hail days here since 2010 -- 2.2 a year over 17 years of record. Those days carry 138 separate reports between them, better than three on a typical one. 3 of those 17 years produced none at all. The busiest single year was 2022, with 6 hail days. The last five years have run hotter than the long-run rate: 16 days since 2022, against 1.8 a year before that.
5 of the 38 days reached 2 inches or more -- 13%, or about one hail day in 8, the last on 2022-05-30. They land in the same month as everything else, May. 11 of the 38 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of South Dakota, see the South Dakota hail map and history.
Hardest-hit places in Minnehaha County
Reports cluster nearest Sioux Falls -- 20 of the county's 38 hail days -- then Dell Rapids (5), Brandon (5), Hartford (5) and Garretson (5). That one town is named on 53% of them. Beyond those, NOAA names Wall Lake, Valley Springs, Rowena, Baltic, Humboldt, Colton, Crooks and Tea on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 5 W Sioux Falls | 7 | 2.00″ |
| 3 Ese Sioux Falls | 4 | 1.75″ |
| Dell Rapids | 4 | 1.75″ |
| 4 SW Sioux Falls | 4 | 1.50″ |
| 4 Wnw Rowena | 3 | 2.00″ |
When it hails in Minnehaha County
The season runs May through August: 31 of the 38 hail days on record fall in those 4 months (82%). May is the single busiest month, with 9 of them (24%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in April and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 5 |
| May | 9 |
| June | 7 |
| July | 6 |
| August | 9 |
| September | 2 |
Recent Minnehaha County hail days
That day put 7 reports on the map, the biggest 1.75 inches near Humboldt. 5 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-08-20 | 1.75″ | 7 |
| 2026-05-31 | 1.00″ | 1 |
| 2026-05-24 | 1.00″ | 3 |
| 2026-05-17 | 1.00″ | 2 |
| 2026-04-13 | 1.50″ | 2 |
| 2025-09-16 | 1.00″ | 1 |
| 2025-08-05 | 1.75″ | 2 |
| 2025-07-09 | 1.00″ | 4 |
How to read the Minnehaha County map
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 3.5 inches, which is the purple band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own, over the state line included: Lincoln County (34 hail days), Turner County (26), Moody County (18), Rock County, Minnesota (25) and Lyon County, Iowa (30). Minnehaha County takes more hail than any of them.
Lincoln County · Turner County · Moody County · Rock County, Minnesota · Lyon County, Iowa
Back to the South Dakota hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Minnehaha County, South Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.