Hail history for Grant County, SD

Grant County has 128 recorded hail events in the NOAA Storm Events Database — 83 of them 1″ or larger and 6 at 2″ or larger. The largest on record: 2.75″ (baseball) on August 28, 2021.

Records 1950–present Data through April 2026 Peak month June

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 128 since 1957

1″ or larger 83 NWS severe threshold

2″ or larger 6 hen egg class and up

Largest recorded 2.75″ baseball · August 28, 2021

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Grant County

Recorded events by month, 1950–present. The amber bar marks Grant County's peak: June.

Most recent recorded events

Latest 8 of 128 recorded events · data through April 2026
Date	Size	Comparable to
August 21, 2025	1.0″	Quarter
August 21, 2025	0.75″	Penny
August 21, 2025	1.0″	Quarter
June 18, 2024	1.0″	Quarter
September 8, 2022	1.0″	Quarter
August 28, 2021	1.25″	Half dollar
August 28, 2021	1.75″	Golf ball
August 28, 2021	2.5″	Tennis ball

Looking for a specific storm? Use the did-it-hail date lookup for Grant County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

September 8, 2022 · 1.0″ (quarter)

The timing and location of the report are approximated.

August 18, 2017 · 1.75″ (golf ball)

Hail covered the entire highway.

July 25, 2008 · 1.75″ (golf ball)

Golf ball sized hail combined with seventy mph winds broke all of the windows out of the northwest side of the house and two other outbuildings. The paint was also chipped off the northwest sides of all three buildings. One hundred forty acres of corn was also destroyed by the hail and wind.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	2	2	4	13	46	46	14

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Grant County

Has it ever hailed in Grant County?

Yes — 128 hail events have been recorded for Grant County, SD in the NOAA Storm Events Database since 1957, including 83 of 1″ (quarter size) or larger.

When did it last hail in Grant County?

The most recent recorded hail event for Grant County, SD is August 21, 2025, with 1.0″ (quarter) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Grant County?

2.75″ (baseball), recorded on August 28, 2021. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More South Dakota hail history

All 66 South Dakota counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.