Colona, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 15.7 °C (high). Annual precipitation averages 973.3 Millimeters. Colona 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 | -9.7 °C | -0.8 °C | 40.13 mm |
| February | -7.8 °C | 1.7 °C | 44.96 mm |
| March | -1.9 °C | 8.8 °C | 63.75 mm |
| April | 4.2 °C | 16.2 °C | 93.98 mm |
| May | 10.8 °C | 22.4 °C | 123.95 mm |
| June | 16.4 °C | 27.6 °C | 122.94 mm |
| July | 18.4 °C | 29.3 °C | 108.71 mm |
| August | 17.2 °C | 28.3 °C | 100.33 mm |
| September | 12.7 °C | 24.9 °C | 90.93 mm |
| October | 6.1 °C | 17.8 °C | 72.9 mm |
| November | -0.6 °C | 9.4 °C | 58.42 mm |
| December | -6.3 °C | 2.2 °C | 52.32 mm |
| Annual | 5 °C | 15.7 °C | 973.32 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 |