Hail history for Big Horn County, MT

Big Horn County has 247 recorded hail events in the NOAA Storm Events Database — 149 of them 1″ or larger and 20 at 2″ or larger. The largest on record: 4.0″ (softball) on July 25, 1962.

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 247 since 1956

1″ or larger 149 NWS severe threshold

2″ or larger 20 hen egg class and up

Largest recorded 4.0″ softball · July 25, 1962

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 Big Horn County

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

Most recent recorded events

Latest 8 of 247 recorded events · data through April 2026
Date	Size	Comparable to
August 7, 2025	1.0″	Quarter
August 7, 2025	1.0″	Quarter
July 5, 2025	1.5″	Ping-pong ball
July 5, 2025	1.75″	Golf ball
June 28, 2025	1.25″	Half dollar
June 13, 2025	1.5″	Ping-pong ball
June 13, 2025	2.0″	Hen egg
June 13, 2025	2.5″	Tennis ball

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

From the storm reports

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

August 7, 2025 · 1.0″ (quarter)

Reported from local spotter.

June 13, 2025 · 2.75″ (baseball)

Two and 3 quarters inch hail reported.

July 5, 1998 · 2.75″ (baseball)

Baseball sized hail damaged numerous vehicles and broke several windows and yard lights.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
8	9	1	2	38	96	67	26

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 Big Horn County

Has it ever hailed in Big Horn County?

Yes — 247 hail events have been recorded for Big Horn County, MT in the NOAA Storm Events Database since 1956, including 149 of 1″ (quarter size) or larger.

When did it last hail in Big Horn County?

The most recent recorded hail event for Big Horn County, MT is August 7, 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 Big Horn County?

4.0″ (softball), recorded on July 25, 1962. 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.