Hail in Cook County, Illinois
Radar recorded hail of 1 inch or larger in Cook County on 30 days since October 2020. That is more than 59% of US counties. It ranks 40 of 102 in Illinois.
The largest radar estimate was 2.2 inches on May 7, 2024. The most recent 1-inch day was August 9, 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 | 5 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 9 |
Largest hail days
| Storm day | Radar estimate |
|---|---|
| May 7, 2024 | 2.2 in |
| May 15, 2025 | 2.15 in |
| July 27, 2026 | 2.05 in |
| March 30, 2026 | 1.9 in |
| June 13, 2022 | 1.85 in |
| September 29, 2021 | 1.75 in |
Ground reports
Within this area, storm spotters and weather offices logged 87 hail reports since October 2020, and 31 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 Illinois
- McLean County: 69 days
- Sangamon County: 54 days
- Madison County: 50 days
- Macon County: 49 days
- Morgan County: 49 days
- Macoupin County: 48 days