Hail history for Ravalli County, MT

Ravalli County has 85 recorded hail events in the NOAA Storm Events Database — 57 of them 1″ or larger and 2 at 2″ or larger. The largest on record: 2.75″ (baseball) on June 28, 1988.

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 85 since 1975

1″ or larger 57 NWS severe threshold

2″ or larger 2 hen egg class and up

Largest recorded 2.75″ baseball · June 28, 1988

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 Ravalli County

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

Most recent recorded events

Latest 8 of 85 recorded events · data through April 2026
Date	Size	Comparable to
July 9, 2022	0.88″	Nickel
July 9, 2022	1.0″	Quarter
July 8, 2022	1.0″	Quarter
July 8, 2022	0.75″	Penny
July 7, 2022	1.5″	Ping-pong ball
July 3, 2022	1.0″	Quarter
July 3, 2022	1.0″	Quarter
June 18, 2022	1.0″	Quarter

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

From the storm reports

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

July 8, 2022 · 0.75″ (penny)

Although the largest public report of hail was 3/4 on Deer Mountain east of Darby, MT, radar did estimate 1.25 hail with a reflectivity core of 70 dbz at 33,000 feet.

June 4, 2012 · 1.75″ (golf ball)

A member of the public reported of 1.75 inch hail in Hamilton.

July 31, 2010 · 1.75″ (golf ball)

A trained spotter reported heavy rain with hail.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	1	8	9	31	27	9

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 Ravalli County

Has it ever hailed in Ravalli County?

Yes — 85 hail events have been recorded for Ravalli County, MT in the NOAA Storm Events Database since 1975, including 57 of 1″ (quarter size) or larger.

When did it last hail in Ravalli County?

The most recent recorded hail event for Ravalli County, MT is July 9, 2022, with 0.88″ (nickel) 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 Ravalli County?

2.75″ (baseball), recorded on June 28, 1988. 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 Montana hail history

All 56 Montana 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.