Hail history for Gregory, South Dakota
NOAA hail reports in and within about 5 km (3 miles) of Gregory since 1959, with preliminary reports to November 5, 2026.
Readout · Gregory
- Last hail
- Aug 3, 2025
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 5, 2021 · 2 reports
- Largest ever
- 2.00 in
- hen egg · Aug 10, 2020
32 reports on 26 days since 1959 · #46 of 305 South Dakota places
Hail map · Gregory
- 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 Gregory
The latest hail report in and around Gregory is from August 3, 2025, 1.00 in (quarter size). Since November 5, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.25 in on August 25, 2024.
Over the 20 years 2006–2025, Gregory logged 13 reports on 11 hail days, about 0.7 reports a year. That is 44% more than the median South Dakota town on this site (0.5 a year) and ranks #46 of 305 South Dakota cities and towns on this site for all-time reports. Gregory accounts for 13% of the 251 reports filed in Gregory County.
9% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median South Dakota town on this site. The largest hail on record here is 2.00 in (hen egg) on August 10, 2020 near Gregory.
Reports were up 17% in 2016–2025 (7) compared with 2006–2015 (6). The busiest year was 1999, with 3 reports on 2 days. Hail here peaks in June (28% of reports); 47% fall between April and June.
Reports a year 2006–2025 average
- Gregory 0.7
- Gregory County 6.8
- Median South Dakota town on this site 0.5
Hail days 2006–2025
- Gregory 11
- Gregory County 67
- Median South Dakota town on this site 7
Share 2 in or larger of sized reports
- Gregory 9%
- Gregory County 8%
- Median South Dakota town on this site 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 2 | 2 | |||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 1 | 1 | |||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 5, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 3, 2025 | 1 | 1.00 in | — |
| Aug 25, 2024 | 1 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 10, 2020 | 2.00 inhen egg | Gregory | Gregory | 03:33 local · NCEI |
| Jul 17, 2010 | 2.00 inhen egg | 2.81 S Gregory Arpt | Gregory | 16:58 local · NCEI |
| Aug 3, 2009 | 2.00 inhen egg | Gregory | Gregory | 20:55 local · NCEI |
| Jul 10, 2008 | 1.75 ingolf ball | Gregory | Gregory | 00:20 local · NCEI |
| Aug 25, 1990 | 1.75 ingolf ball | — | Gregory | 19:13 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 11 34%
- 1–2 in 18 56%
- 2 in + 3 9%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 3, 2025 | 1.00 inquarter | 0.69 N Gregory | Gregory | 17:00 local · NCEI |
| Aug 25, 2024 | 1.25 inhalf dollar | 2.13 NNW Gregory | Gregory | 17:30 local · NCEI |
| Jun 23, 2021 | 0.88 innickel | Gregory | Gregory | 18:20 local · NCEI |
| Jun 23, 2021 | 0.75 inpenny | 0.69 N Gregory | Gregory | 18:20 local · NCEI |
| Aug 10, 2020 | 2.00 inhen egg | Gregory | Gregory | 03:33 local · NCEI |
| Jun 13, 2018 | 1.00 inquarter | 0.69 S Gregory | Gregory | 13:40 local · NCEI |
| Jul 19, 2017 | 1.00 inquarter | 2.89 SW Gregory | Gregory | 15:15 local · NCEI |
| Jul 17, 2010 | 2.00 inhen egg | 2.81 S Gregory Arpt | Gregory | 16:58 local · NCEI |
| Aug 3, 2009 | 2.00 inhen egg | Gregory | Gregory | 20:55 local · NCEI |
| Jul 10, 2008 | 1.50 inping pong ball | 1.22 SW Gregory Arpt | Gregory | 00:25 local · NCEI |
| Jul 10, 2008 | 1.75 ingolf ball | Gregory | Gregory | 00:20 local · NCEI |
| May 5, 2007 | 0.75 inpenny | Gregory | Gregory | 16:02 local · NCEI |
Hail history near Gregory
- Dallas 8 km · 11
- Burke 12 km · 27
- Herrick 23 km · 12
- Colome 24 km · 20
- Platte Colony 36 km · 10
- Winner 39 km · 43
- Bijou Hills 40 km · 13
- Bonesteel 42 km · 15
Questions about hail in Gregory
How often does it hail in Gregory, South Dakota?
32 hail reports have been logged in and within about 5 km (3 miles) of Gregory since 1959. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #46 of 305 South Dakota places by number of reports.
When is hail season in Gregory?
Most reports come in June, July, August. June alone accounts for 28% of all reports.
What is the largest hail recorded in Gregory?
2.00 in (hen egg size) on August 10, 2020 near Gregory. 9% of reports here were 2 inches or larger.
When did it last hail in Gregory?
The most recent report in this data is from August 3, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 5, 2026.
How many hail storms has Gregory had in the last five years?
2 separate days with hail reports since November 5, 2021, adding up to 2 reports. The most recent was August 3, 2025.
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.