Hail history for Summit County, UT

Summit County has 12 recorded hail events in the NOAA Storm Events Database — 7 of them 1″ or larger. The largest on record: 1.5″ (ping-pong ball) on September 25, 1990.

Records 1950–present Data through April 2026 Peak month July

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 12 since 1987

1″ or larger 7 NWS severe threshold

2″ or larger 0 hen egg class and up

Largest recorded 1.5″ ping-pong ball · September 25, 1990

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 Summit County

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

Most recent recorded events

Latest 8 of 12 recorded events · data through April 2026
Date	Size	Comparable to
May 17, 2021	0.75″	Penny
August 11, 2016	1.0″	Quarter
July 18, 2015	0.88″	Nickel
September 5, 2007	0.75″	Penny
September 5, 2007	1.0″	Quarter
July 25, 2007	1.0″	Quarter
August 26, 2006	0.88″	Nickel
May 21, 1998	0.75″	Penny

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

From the storm reports

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

May 17, 2021 · 0.75″ (penny)

Penny-sized hail fell in Park City.

August 11, 2016 · 1.0″ (quarter)

Quarter-sized hail was reported in Kamas.

September 5, 2007 · 1.0″ (quarter)

One inch diameter hail was reported by a television station in Henefer; the time provided was estimated.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	0	2	3	4	2	1

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 Summit County

Has it ever hailed in Summit County?

Yes — 12 hail events have been recorded for Summit County, UT in the NOAA Storm Events Database since 1987, including 7 of 1″ (quarter size) or larger.

When did it last hail in Summit County?

The most recent recorded hail event for Summit County, UT is May 17, 2021, with 0.75″ (penny) 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 Summit County?

1.5″ (ping-pong ball), recorded on September 25, 1990. Hail that size meets or exceeds the National Weather Service severe threshold. 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 Utah hail history

All 29 Utah 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.