Hail in Petroleum County, Montana
Radar recorded hail of 1 inch or larger in Petroleum County on 43 days since October 2020. That is more than 77% of US counties. It ranks 24 of 56 in Montana.
The largest radar estimate was 3.05 inches on July 5, 2022. The most recent 1-inch day was August 18, 2026. Radar estimates and ground reports often differ, so see how they compare.
See the county center on the map
Days of 1-inch hail by year
| Year | Days |
|---|---|
| 2020 (from October) | 0 |
| 2021 | 4 |
| 2022 | 9 |
| 2023 | 9 |
| 2024 | 4 |
| 2025 | 14 |
| 2026 | 3 |
Largest hail days
| Storm day | Radar estimate |
|---|---|
| July 5, 2022 | 3.05 in |
| July 17, 2025 | 3 in |
| July 29, 2023 | 2.75 in |
| June 14, 2025 | 2.7 in |
| August 7, 2025 | 2.5 in |
| August 18, 2026 | 2.5 in |
Ground reports
Within this area, storm spotters and weather offices logged 15 hail reports since October 2020, and 7 tornadoes started here since 1950.
Figures cover a circle with the same land area as the county, centered on it, so edges are approximate.
Most hail days in Montana
- Carter County: 96 days
- Powder River County: 87 days
- Fergus County: 84 days
- Big Horn County: 80 days
- Rosebud County: 74 days
- Garfield County: 71 days