| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 54a - Illinois/Indiana Prairies |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 61443 - Kewanee, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 17 | 27 | 38 | 49 | 59 | 63 | 61 | 52 | 40 | 29 | 17 | 39 |
| Avg Max Temp (°F) | 28 | 34 | 47 | 60 | 71 | 81 | 84 | 82 | 75 | 63 | 47 | 34 | 59 |
| Avg Precip (In.) | 1.55 | 1.42 | 2.54 | 3.57 | 3.66 | 4.41 | 3.99 | 4.11 | 3.16 | 2.63 | 2.77 | 2.32 | 36.13 |