Wayne City, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.4 °C (low) to 18.8 °C (high). Annual precipitation averages 1135.6 Millimeters. Wayne City is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 4.2 °C | 82.04 mm |
| February | -3.3 °C | 6.9 °C | 69.85 mm |
| March | 1.4 °C | 12.6 °C | 95.5 mm |
| April | 7.1 °C | 19.2 °C | 119.63 mm |
| May | 12.9 °C | 24.4 °C | 121.16 mm |
| June | 17.8 °C | 29.3 °C | 122.94 mm |
| July | 19.5 °C | 30.8 °C | 97.03 mm |
| August | 18.2 °C | 30.4 °C | 85.34 mm |
| September | 13.8 °C | 27.2 °C | 80.01 mm |
| October | 7.4 °C | 20.8 °C | 86.36 mm |
| November | 1.7 °C | 12.8 °C | 97.28 mm |
| December | -2.6 °C | 6.5 °C | 78.49 mm |
| Annual | 7.4 °C | 18.8 °C | 1135.63 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |