Hail history for Roberts County, South Dakota
Every NOAA hail report filed in Roberts County since 1956, with preliminary National Weather Service reports to November 3, 2026.
Readout · Roberts County
- Last hail
- Jul 4, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 6
- since Nov 3, 2021 · 8 reports
- Largest ever
- 4.00 in
- grapefruit · Jul 19, 1997
133 reports on 86 days since 1956 · #57 of 67 South Dakota counties
Hail map · Roberts 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 Roberts County
The latest hail report in Roberts County is from July 4, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 6 separate hail days; the biggest stones in that time were 1.25 in on July 31, 2024.
Over the 20 years 2006–2025, Roberts County logged 59 reports on 36 hail days, about 3.0 reports a year. That is about half the median South Dakota county (5.5 a year) and ranks #57 of 67 South Dakota counties for all-time reports. Roberts County holds 1% of all 17,223 hail reports in South Dakota.
7% 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 4.00 in (grapefruit) on July 19, 1997 near 10 E Wilmot.
Reports were down 49% in 2016–2025 (20) compared with 2006–2015 (39). The busiest year was 2002, with 11 reports on 5 days. Hail here peaks in July (29% of reports); 50% fall between April and June.
Reports a year 2006–2025 average
- Roberts County 3.0
- Median South Dakota county 5.5
Hail days 2006–2025
- Roberts County 36
- Median South Dakota county 54
Share 2 in or larger of sized reports
- Roberts County 7%
- 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 | 2 | 1 | 3 | ||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 2 | 3 | 5 | ||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jul 4, 2026 | 1 | 1.00 in | — |
| Jul 28, 2025 | 2 | 1.00 in | — |
| Jul 15, 2025 | 1 | 1.00 in | — |
| Jul 31, 2024 | 1 | 1.25 in | — |
| Jul 20, 2022 | 1 | 1.00 in | — |
| May 30, 2022 | 2 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 19, 1997 | 4.00 ingrapefruit | 10 E Wilmot | 20:38 local · NCEI |
| Aug 13, 1958 | 2.75 inbaseball | — | 17:30 local · NCEI |
| Jul 17, 2015 | 2.50 intennis ball | 2.76 N Sisseton | 18:10 local · NCEI |
| Jun 7, 1963 | 2.25 inhen egg | — | 03:00 local · NCEI |
| Jul 31, 1994 | 2.00 inhen egg | Sisseton | 20:42 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 48 36%
- 1–2 in 76 57%
- 2 in + 9 7%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 4, 2026 | 1.00 inquarter | 8.8 ENE Corona | 16:54 local · NCEI |
| Jul 28, 2025 | 1.00 inquarter | 0.69 N New Effington | 17:07 local · NCEI |
| Jul 28, 2025 | 0.88 innickel | 3.45 N Victor | 16:43 local · NCEI |
| Jul 15, 2025 | 1.00 inquarter | 3.95 SSE Rosholt | 01:00 local · NCEI |
| Jul 31, 2024 | 1.25 inhalf dollar | 2.81 N Sisseton Arpt | 16:20 local · NCEI |
| Jul 20, 2022 | 1.00 inquarter | 4.84 S Wilmot | 19:41 local · NCEI |
| May 30, 2022 | 1.00 inquarter | 9.14 NE Corona | 13:58 local · NCEI |
| May 30, 2022 | 1.00 inquarter | Corona | 12:57 local · NCEI |
| Aug 26, 2021 | 0.88 innickel | 0.97 W Peever | 13:34 local · NCEI |
| Apr 6, 2020 | 1.00 inquarter | 0.69 S Sisseton | 21:36 local · NCEI |
| Jul 10, 2018 | 0.88 innickel | 0.69 N Ortley | 05:30 local · NCEI |
| Jul 10, 2018 | 1.00 inquarter | 2.93 NNW Ortley | 05:22 local · NCEI |
Cities and towns in Roberts County
| Place | Reports | Largest |
|---|---|---|
| Summit | 15 | 1.75 in |
| Sisseton | 14 | 2.75 in |
| Long Hollow | 13 | 2.75 in |
| Wilmot | 12 | 1.50 in |
| New Effington | 11 | 1.75 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 |
|---|---|---|---|
| Rosholt | 7 | 7 | Aug 31, 2013 |
| Claire City | 6 | 4 | Jun 24, 2018 |
| Ortley | 4 | 3 | Jul 10, 2018 |
| Peever | 4 | 4 | Aug 26, 2021 |
| Agency Village | 3 | 3 | Jul 4, 2016 |
| Peever Flats | 1 | 1 | Jul 11, 2017 |
| Veblen | 1 | 1 | Sep 3, 2005 |
| White Rock Colony | 1 | 1 | Jul 13, 2006 |
Questions about hail in Roberts County
How often does it hail in Roberts County, South Dakota?
133 hail reports have been logged in Roberts County since 1956. Over the 20 years 2006–2025 that averages 3.0 reports a year. That ranks #57 of 67 South Dakota counties by number of reports.
When is hail season in Roberts County?
Most reports come in July, June, May. July alone accounts for 29% of all reports.
What is the largest hail recorded in Roberts County?
4.00 in (grapefruit size) on July 19, 1997 near 10 E Wilmot. 7% of reports here were 2 inches or larger.
When did it last hail in Roberts County?
The most recent report in this data is from July 4, 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 Roberts County had in the last five years?
6 separate days with hail reports since November 3, 2021, adding up to 8 reports. The most recent was July 4, 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.