Orangeville, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.1 °C (low) to 14.3 °C (high). Annual precipitation averages 955.6 Millimeters. Orangeville 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 | -11.4 °C | -2.2 °C | 35.81 mm |
| February | -9.6 °C | 0.2 °C | 39.37 mm |
| March | -3.7 °C | 7.1 °C | 50.55 mm |
| April | 2.2 °C | 14.7 °C | 93.98 mm |
| May | 8.8 °C | 21.1 °C | 106.17 mm |
| June | 14.4 °C | 26.4 °C | 141.99 mm |
| July | 16.3 °C | 28.1 °C | 107.7 mm |
| August | 15.2 °C | 27.2 °C | 103.38 mm |
| September | 10.4 °C | 23.6 °C | 98.55 mm |
| October | 4.2 °C | 16.4 °C | 77.72 mm |
| November | -2 °C | 7.9 °C | 56.13 mm |
| December | -7.8 °C | 0.8 °C | 44.2 mm |
| Annual | 3.1 °C | 14.3 °C | 955.55 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 |