Bushnell, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 16.5 °C (high). Annual precipitation averages 970.8 Millimeters. Bushnell 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 | -9.2 °C | 0.4 °C | 46.99 mm |
| February | -7.2 °C | 2.9 °C | 48.01 mm |
| March | -1.5 °C | 10 °C | 65.53 mm |
| April | 4.4 °C | 17.3 °C | 95.76 mm |
| May | 11.1 °C | 23.2 °C | 127.51 mm |
| June | 16.4 °C | 28.1 °C | 124.71 mm |
| July | 18.2 °C | 29.7 °C | 100.33 mm |
| August | 16.8 °C | 28.8 °C | 85.34 mm |
| September | 12.3 °C | 25.6 °C | 91.95 mm |
| October | 5.8 °C | 18.8 °C | 77.47 mm |
| November | -0.5 °C | 10.3 °C | 60.71 mm |
| December | -5.9 °C | 3.3 °C | 46.48 mm |
| Annual | 5.1 °C | 16.5 °C | 970.79 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 6a : -23.3°C to -20.6°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 |