Hail in Pennington County, South Dakota
Radar recorded hail of 1 inch or larger in Pennington County on 168 days since October 2020. That is more than 100% of US counties. It ranks 1 of 66 in South Dakota.
The largest radar estimate was 5.5 inches on June 28, 2025. The most recent 1-inch day was September 13, 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 | 22 |
| 2022 | 26 |
| 2023 | 30 |
| 2024 | 35 |
| 2025 | 30 |
| 2026 | 25 |
Largest hail days
| Storm day | Radar estimate |
|---|---|
| June 28, 2025 | 5.5 in |
| August 11, 2026 | 5.35 in |
| July 19, 2025 | 4.55 in |
| June 17, 2022 | 4.5 in |
| August 12, 2023 | 4.3 in |
| July 11, 2024 | 4.15 in |
Ground reports
Within this area, storm spotters and weather offices logged 287 hail reports since October 2020, and 38 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 South Dakota
- Custer County: 160 days
- Oglala Lakota County: 130 days
- Lawrence County: 124 days
- Meade County: 120 days
- Butte County: 115 days
- Fall River County: 111 days