Hail history for Hamlin County, South Dakota
Every NOAA hail report filed in Hamlin County since 1964, with preliminary National Weather Service reports to November 3, 2026.
Readout · Hamlin County
- Last hail
- Jun 3, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 10
- since Nov 3, 2021 · 18 reports
- Largest ever
- 2.75 in
- baseball · Jul 17, 2010
194 reports on 103 days since 1964 · #38 of 67 South Dakota counties
Hail map · Hamlin 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 Hamlin County
The latest hail report in Hamlin County is from June 3, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 10 separate hail days; the biggest stones in that time were 1.75 in on July 27, 2025.
Over the 20 years 2006–2025, Hamlin County logged 100 reports on 48 hail days, about 5.0 reports a year. That is about the same as the median South Dakota county (5.5 a year) and ranks #38 of 67 South Dakota counties for all-time reports. Hamlin County holds 1% of all 17,223 hail reports in South Dakota.
3% 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 July 17, 2010 near 5.89 W Hazel.
Reports held about level in 2016–2025 (49) compared with 2006–2015 (51). The busiest year was 2017, with 15 reports on 7 days. Hail here peaks in July (28% of reports); 47% fall between April and June.
Reports a year 2006–2025 average
- Hamlin County 5.0
- Median South Dakota county 5.5
Hail days 2006–2025
- Hamlin County 48
- Median South Dakota county 54
Share 2 in or larger of sized reports
- Hamlin County 3%
- Median South Dakota county 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 2 | |||||||||||
| 2025 | 4 | 4 | 1 | 9 | |||||||||
| 2024 | 1 | 1 | 2 | ||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 5 | 5 | |||||||||||
| 2021 | 1 | 2 | 3 | ||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | 2 | ||||||||||
| 2018 | 1 | 2 | 1 | 4 | |||||||||
| 2017 | 1 | 5 | 8 | 1 | 15 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 3, 2026 | 2 | 1.00 in | — |
| Sep 2, 2025 | 1 | 1.00 in | — |
| Jul 27, 2025 | 3 | 1.75 in | — |
| Jul 7, 2025 | 1 | 1.00 in | — |
| Jun 28, 2025 | 3 | 1.00 in | — |
| Jun 19, 2025 | 1 | 0.75 in | — |
| Jul 31, 2024 | 1 | 0.75 in | — |
| Jun 18, 2024 | 1 | 0.88 in | — |
| May 30, 2022 | 2 | 1.00 in | — |
| May 12, 2022 | 3 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 17, 2010 | 2.75 inbaseball | 5.89 W Hazel | 16:58 local · NCEI |
| Jul 30, 1999 | 2.75 inbaseball | 2 E Thomas | 13:15 local · NCEI |
| Jul 30, 1999 | 2.75 inbaseball | Hayti | 13:10 local · NCEI |
| Jun 21, 2013 | 2.50 intennis ball | 3.44 W Lake Norden | 14:30 local · NCEI |
| Aug 29, 2001 | 2.50 intennis ball | 5 E Lake Norden | 16:15 local · NCEI |
Size of every report
- Under 1 in 93 48%
- 1–2 in 96 49%
- 2 in + 5 3%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 3, 2026 | 1.00 inquarter | 3.45 S Castlewood | 18:55 local · NCEI |
| Jun 3, 2026 | 1.00 inquarter | 1.47 NNW Thomas | 18:18 local · NCEI |
| Sep 2, 2025 | 1.00 inquarter | 3.51 ENE Hayti | 17:08 local · NCEI |
| Jul 27, 2025 | 1.00 inquarter | Castlewood | 19:25 local · NCEI |
| Jul 27, 2025 | 1.75 ingolf ball | 2.85 NW Castlewood | 19:00 local · NCEI |
| Jul 27, 2025 | 1.75 ingolf ball | 4.54 NE Hazel | 18:40 local · NCEI |
| Jul 7, 2025 | 1.00 inquarter | 1.63 WNW Hayti | 15:37 local · NCEI |
| Jun 28, 2025 | 1.00 inquarter | 2.29 SSE Stone Bridge | 21:54 local · NCEI |
| Jun 28, 2025 | 1.00 inquarter | 2.76 S Thomas | 20:50 local · NCEI |
| Jun 28, 2025 | 1.00 inquarter | 3.99 W Castlewood | 20:40 local · NCEI |
| Jun 19, 2025 | 0.75 inpenny | 0.69 N Castlewood | 22:44 local · NCEI |
| Jul 31, 2024 | 0.75 inpenny | 0.69 N Castlewood | 18:04 local · NCEI |
Cities and towns in Hamlin County
| Place | Reports | Largest |
|---|---|---|
| Lake Poinsett | 24 | 2.50 in |
| Castlewood | 22 | 1.75 in |
| Hazel | 20 | 1.75 in |
| Lake Norden | 20 | 2.50 in |
| Hayti | 19 | 2.75 in |
| Bryant | 15 | 4.00 in |
| Estelline | 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 |
|---|---|---|---|
| Claremont Colony | 6 | 4 | Jul 7, 2011 |
| Poinsett Colony | 5 | 5 | May 12, 2022 |
Questions about hail in Hamlin County
How often does it hail in Hamlin County, South Dakota?
194 hail reports have been logged in Hamlin County since 1964. Over the 20 years 2006–2025 that averages 5.0 reports a year. That ranks #38 of 67 South Dakota counties by number of reports.
When is hail season in Hamlin County?
Most reports come in July, June, May. July alone accounts for 28% of all reports.
What is the largest hail recorded in Hamlin County?
2.75 in (baseball size) on July 17, 2010 near 5.89 W Hazel. 3% of reports here were 2 inches or larger.
When did it last hail in Hamlin County?
The most recent report in this data is from June 3, 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 Hamlin County had in the last five years?
10 separate days with hail reports since November 3, 2021, adding up to 18 reports. The most recent was June 3, 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.