Coleta, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.4 °C (low) to 14.9 °C (high). Annual precipitation averages 989.1 Millimeters. Coleta is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.1 °C | -1.6 °C | 43.18 mm |
| February | -9.1 °C | 0.9 °C | 49.02 mm |
| March | -3.2 °C | 7.7 °C | 61.21 mm |
| April | 2.7 °C | 15.5 °C | 96.77 mm |
| May | 9.3 °C | 21.9 °C | 126.24 mm |
| June | 14.8 °C | 26.9 °C | 129.29 mm |
| July | 16.6 °C | 28.4 °C | 108.46 mm |
| August | 15.4 °C | 27.7 °C | 106.68 mm |
| September | 10.7 °C | 24.4 °C | 92.2 mm |
| October | 4.3 °C | 17.2 °C | 69.34 mm |
| November | -1.8 °C | 8.6 °C | 55.88 mm |
| December | -7.6 °C | 1.4 °C | 50.8 mm |
| Annual | 3.4 °C | 14.9 °C | 989.07 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |