Peotone, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 60 °F (high). Annual precipitation averages 41.2 Inches. Peotone is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.5 °F | 31.8 °F | 2.26 in. |
| February | 19.4 °F | 35.9 °F | 2.05 in. |
| March | 28.8 °F | 47.3 °F | 2.41 in. |
| April | 39.3 °F | 60.1 °F | 3.85 in. |
| May | 50.1 °F | 71.1 °F | 4.65 in. |
| June | 60.0 °F | 80.7 °F | 4.86 in. |
| July | 64.3 °F | 84.4 °F | 4.74 in. |
| August | 62.5 °F | 82.6 °F | 4.25 in. |
| September | 54.9 °F | 76.5 °F | 3.5 in. |
| October | 42.8 °F | 63.5 °F | 3.52 in. |
| November | 32.1 °F | 49.4 °F | 2.81 in. |
| December | 22.2 °F | 37.0 °F | 2.28 in. |
| Annual | 41.1 °F | 60 °F | 41.18 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |