Coyne Center, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.5 °C (high). Annual precipitation averages 962.4 Millimeters. Coyne Center is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.9 °C | -0.9 °C | 39.12 mm |
| February | -7.9 °C | 1.5 °C | 43.94 mm |
| March | -2 °C | 8.7 °C | 62.48 mm |
| April | 4.2 °C | 16.2 °C | 93.22 mm |
| May | 10.7 °C | 22.2 °C | 123.19 mm |
| June | 16.2 °C | 27.3 °C | 122.17 mm |
| July | 18.3 °C | 29.1 °C | 105.92 mm |
| August | 17.1 °C | 28 °C | 100.84 mm |
| September | 12.6 °C | 24.7 °C | 89.41 mm |
| October | 5.9 °C | 17.6 °C | 72.64 mm |
| November | -0.7 °C | 9.2 °C | 58.67 mm |
| December | -6.5 °C | 2 °C | 50.8 mm |
| Annual | 4.8 °C | 15.5 °C | 962.4 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |