| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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: | 72i - Western Dissected Illinoian Till Plain |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 61615 - Peoria, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 28 | 39 | 49 | 59 | 63 | 61 | 52 | 41 | 29 | 18 | 39 |
| Avg Max Temp (°F) | 30 | 36 | 49 | 62 | 73 | 82 | 85 | 83 | 77 | 65 | 49 | 35 | 61 |
| Avg Precip (In.) | 1.61 | 1.65 | 2.89 | 3.6 | 4.23 | 4.07 | 3.95 | 3.45 | 3.33 | 2.78 | 3.02 | 2.39 | 36.99 |