| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71n - Southern Shawnee Hills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 62920 - Cobden, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 27 | 35 | 45 | 54 | 62 | 66 | 63 | 56 | 46 | 36 | 27 | 45 |
| Avg Max Temp (°F) | 42 | 49 | 58 | 69 | 77 | 85 | 89 | 87 | 81 | 72 | 57 | 46 | 68 |
| Avg Precip (In.) | 3.37 | 3.28 | 4.61 | 4.6 | 5.04 | 4.24 | 3.5 | 3.58 | 3.12 | 3.28 | 4.65 | 4.12 | 47.39 |