◆ ACTON, MT HAIL HISTORY · YELLOWSTONE COUNTY
Acton, MT hail history & hail map
Acton, Montana has had 5 hail events in the past 5 years, with hail up to 1.75″ (Golf Ball). Most recent: Aug 8, 2025. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
5Hail events in the past 5 years
1.75″Largest recorded hail · Golf Ball
1.75″Largest ground report (within 3 mi)
0.75″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Acton, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Acton
| Date | Peak hail | Sources |
|---|---|---|
| Aug 8, 2025 | 1.75″ Golf Ball | 1 ground report (max 1.75″) |
| Aug 7, 2025 | 1.75″ Golf Ball | 1 ground report (max 1.75″) |
| Jul 29, 2025 | 1.50″ Ping Pong Ball | Radar 0.75″ · 1 ground report (max 1.50″) |
| Jul 25, 2022 | 0.75″ Penny | Radar 0.75″ |
| Jul 5, 2022 | 0.75″ Penny | 1 ground report (max 0.75″) |
More Montana hail history
All Montana cities & hail days →
Events count days with NOAA MRMS radar hail over Acton (45.850, -108.730) or an NWS / CoCoRaHS hail report within 3 miles. Data window: NOAA MRMS radar hail swaths Oct 2021 – Nov 2026; NWS / NCEI Storm Events reports Nov 2024 – Jul 2026; CoCoRaHS volunteer reports Oct 2021 – present. Radar hail sizes are estimates, not ground truth; hail at any single address can differ.