Hail history for Jefferson, South Dakota
NOAA hail reports in and within about 5 km (3 miles) of Jefferson since 1970, with preliminary reports to November 3, 2026.
Readout · Jefferson
- Last hail
- Jun 25, 2024
- 0.75 in, penny size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 2 reports
- Largest ever
- 2.75 in
- baseball · Jun 5, 1999
16 reports on 16 days since 1970 · #173 of 305 South Dakota places
Hail map · Jefferson
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Concerned about your roof after hail?
Send a request to Moxisync Labs for review. The latest hail report in Jefferson is from June 25, 2024. We’re building local roofer coverage. Submitting a request does not guarantee a quote or book an inspection.
Phone line opening soon
What the record says about Jefferson
The latest hail report in and around Jefferson is from June 25, 2024, 0.75 in (penny size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.25 in on March 30, 2023.
Over the 20 years 2006–2025, Jefferson logged 5 reports on 5 hail days, about 0.3 reports a year. That is 44% less than the median South Dakota town on this site (0.5 a year) and ranks #173 of 305 South Dakota cities and towns on this site for all-time reports. Jefferson accounts for 10% of the 162 reports filed in Union County.
13% 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 2.75 in (baseball) on June 5, 1999 near Jefferson.
The busiest year was 2005, with 2 reports on 2 days. Hail here peaks in June (31% of reports); 63% fall between April and June.
Reports a year 2006–2025 average
- Jefferson 0.3
- Union County 2.9
- Median South Dakota town on this site 0.5
Hail days 2006–2025
- Jefferson 5
- Union County 44
- Median South Dakota town on this site 7
Share 2 in or larger of sized reports
- Jefferson 13%
- Union County 4%
- 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 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 25, 2024 | 1 | 0.75 in | — |
| Mar 30, 2023 | 1 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 5, 1999 | 2.75 inbaseball | Jefferson | Union | $300K | 15:49 local · NCEI |
| Jul 28, 1986 | 2.75 inbaseball | — | Union | — | 17:20 local · NCEI |
| May 28, 1998 | 1.75 ingolf ball | Jefferson | Union | — | 18:15 local · NCEI |
| Jul 1, 1996 | 1.75 ingolf ball | Jefferson | Union | $20K | 17:21 local · NCEI |
| Apr 26, 1984 | 1.75 ingolf ball | — | Union | — | 16:50 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 7 44%
- 1–2 in 7 44%
- 2 in + 2 13%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 25, 2024 | 0.75 inpenny | 2.46 NW Jefferson | Union | — | 19:20 local · NCEI |
| Mar 30, 2023 | 1.25 inhalf dollar | 2.31 NNW Jefferson | Union | — | 22:22 local · NCEI |
| Jun 29, 2017 | 1.25 inhalf dollar | 0.51 W Jefferson | Union | — | 14:55 local · NCEI |
| May 10, 2015 | 1.00 inquarter | 0.51 W Jefferson | Union | — | 14:19 local · NCEI |
| Oct 23, 2010 | 0.75 inpenny | 3.69 NW Jefferson | Union | — | 16:12 local · NCEI |
| Aug 3, 2005 | 1.00 inquarter | Jefferson | Union | — | 20:48 local · NCEI |
| Jul 29, 2005 | 0.88 innickel | Jefferson | Union | — | 02:07 local · NCEI |
| May 24, 2004 | 0.75 inpenny | 1 NW Jefferson | Union | — | 12:00 local · NCEI |
| Apr 21, 2004 | 0.75 inpenny | 4 SW Jefferson | Union | — | 14:15 local · NCEI |
| Jun 7, 2002 | 0.88 innickel | Jefferson | Union | — | 17:17 local · NCEI |
| Jun 5, 1999 | 2.75 inbaseball | Jefferson | Union | $300K | 15:49 local · NCEI |
| May 28, 1998 | 1.75 ingolf ball | Jefferson | Union | — | 18:15 local · NCEI |
Hail history near Jefferson
- North Sioux City 10 km · 18
- Elk Point 13 km · 30
- Burbank 27 km · 19
- Vermillion 35 km · 49
- Alcester 48 km · 21
- Meckling 49 km · 20
- Beresford 56 km · 15
- Gayville 59 km · 19
Questions about hail in Jefferson
How often does it hail in Jefferson, South Dakota?
16 hail reports have been logged in and within about 5 km (3 miles) of Jefferson since 1970. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #173 of 305 South Dakota places by number of reports.
When is hail season in Jefferson?
Most reports come in June, May, July. June alone accounts for 31% of all reports.
What is the largest hail recorded in Jefferson?
2.75 in (baseball size) on June 5, 1999 near Jefferson. 13% of reports here were 2 inches or larger.
When did it last hail in Jefferson?
The most recent report in this data is from June 25, 2024 (0.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Jefferson had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 2 reports. The most recent was June 25, 2024.
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.