| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°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: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 61752 - Le Roy, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 20 | 30 | 40 | 51 | 60 | 64 | 62 | 54 | 43 | 32 | 21 | 41 |
| Avg Max Temp (°F) | 32 | 37 | 49 | 62 | 74 | 83 | 86 | 84 | 78 | 66 | 50 | 37 | 61 |
| Avg Precip (In.) | 1.74 | 1.74 | 3.05 | 3.61 | 4.17 | 3.99 | 4.03 | 3.87 | 2.97 | 2.75 | 3.07 | 2.6 | 37.61 |