Yale, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 18.2 °C (high). Annual precipitation averages 1147.6 Millimeters. Yale is located in USDA Plant Hardiness Zone 6b. 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 | -5.8 °C | 3.1 °C | 80.01 mm |
| February | -4.2 °C | 5.8 °C | 63.75 mm |
| March | 0.8 °C | 11.8 °C | 87.88 mm |
| April | 6.6 °C | 18.9 °C | 125.73 mm |
| May | 12.6 °C | 24.2 °C | 124.71 mm |
| June | 17.4 °C | 28.9 °C | 129.29 mm |
| July | 18.9 °C | 30.7 °C | 108.97 mm |
| August | 17.7 °C | 30.1 °C | 77.98 mm |
| September | 13.3 °C | 27.1 °C | 82.3 mm |
| October | 7.1 °C | 20.4 °C | 92.96 mm |
| November | 1.4 °C | 12.2 °C | 96.52 mm |
| December | -3.2 °C | 5.6 °C | 77.47 mm |
| Annual | 6.9 °C | 18.2 °C | 1147.57 mm |
| 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |