Reddick, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.6 °F (low) to 60.5 °F (high). Annual precipitation averages 38.1 Inches. Reddick is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.9 °F | 31.7 °F | 2.05 in. |
| February | 19.0 °F | 36.0 °F | 1.8 in. |
| March | 28.5 °F | 48.2 °F | 2.44 in. |
| April | 38.9 °F | 61.2 °F | 3.65 in. |
| May | 50.4 °F | 72.4 °F | 4.62 in. |
| June | 60.3 °F | 81.5 °F | 4.58 in. |
| July | 63.7 °F | 84.3 °F | 4.2 in. |
| August | 61.6 °F | 82.6 °F | 3.72 in. |
| September | 53.5 °F | 77.5 °F | 3.27 in. |
| October | 42.0 °F | 64.4 °F | 3.12 in. |
| November | 31.4 °F | 49.5 °F | 2.56 in. |
| December | 21.6 °F | 36.9 °F | 2.05 in. |
| Annual | 40.6 °F | 60.5 °F | 38.06 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |