Wyanet, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 15.6 °C (high). Annual precipitation averages 969.8 Millimeters. Wyanet is located in USDA Plant Hardiness Zone 5b. 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 | -9.6 °C | -0.8 °C | 46.23 mm |
| February | -7.7 °C | 1.7 °C | 46.48 mm |
| March | -2.1 °C | 8.7 °C | 60.2 mm |
| April | 3.8 °C | 16.2 °C | 95 mm |
| May | 10.4 °C | 22.4 °C | 123.7 mm |
| June | 15.8 °C | 27.3 °C | 120.9 mm |
| July | 17.7 °C | 29 °C | 98.55 mm |
| August | 16.5 °C | 28.1 °C | 97.54 mm |
| September | 11.8 °C | 24.8 °C | 90.42 mm |
| October | 5.4 °C | 17.8 °C | 75.95 mm |
| November | -0.8 °C | 9.3 °C | 63.75 mm |
| December | -6.3 °C | 2.2 °C | 51.05 mm |
| Annual | 4.6 °C | 15.6 °C | 969.77 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |