HailHistory › Hail by county › Montana › Gallatin County
Montana · county FIPS 30031
Hail history for Gallatin County, MT
Gallatin County has 94 recorded hail events in the NOAA Storm Events Database — 71 of them 1″ or larger and 3 at 2″ or larger. The largest on record: 2.75″ (baseball) on June 30, 2010.
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.
When it hails in Gallatin County
Recorded events by month, 1950–present. The amber bar marks Gallatin County's peak: July.
Most recent recorded events
| Date | Size | Comparable to |
|---|---|---|
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 1.75″ | Golf ball |
Looking for a specific storm? Use the did-it-hail date lookup for Gallatin County.
From the storm reports
Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).
· 1.0″ (quarter)
Public report of quarter sized hail 2 ENE of Manhattan. Wheat fields were damaged by the hail. Time and location was estimated.
· 2.75″ (baseball)
A thunderstorm dropped 2.75 inch diameter hail at Belgrade 4ESE. Hail damage was particularly severe in Bozeman. Montana State University reported up to 1000 windows damaged on campus with a repair estimate in excess of $100,000. The city of Bozeman also reported cleaning up nearly 5 tons of debris consisting of tress and tree limbs.
· 2.0″ (hen egg)
A thunderstorm dropped 2 inch diameter hail at Bozeman 5W. Shattered home windows were reported.
Events by decade
| 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|
| 6 | 3 | 2 | 2 | 11 | 27 | 18 | 25 |
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 Gallatin County
Has it ever hailed in Gallatin County?
Yes — 94 hail events have been recorded for Gallatin County, MT in the NOAA Storm Events Database since 1958, including 71 of 1″ (quarter size) or larger.
When did it last hail in Gallatin County?
The most recent recorded hail event for Gallatin County, MT is August 19, 2024, 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 Gallatin County?
2.75″ (baseball), recorded on June 30, 2010. 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
- Yellowstone County 506
- Valley County 470
- Powder River County 373
- Rosebud County 333
- Garfield County 291
- Carter County 290
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.