Oakwood, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 16.8 °C (high). Annual precipitation averages 1037.6 Millimeters. Oakwood 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 | -7.7 °C | 1.1 °C | 61.98 mm |
| February | -5.9 °C | 3.6 °C | 53.85 mm |
| March | -0.8 °C | 10.1 °C | 73.66 mm |
| April | 5.1 °C | 17.6 °C | 105.16 mm |
| May | 11.4 °C | 23.4 °C | 116.33 mm |
| June | 16.4 °C | 27.9 °C | 122.43 mm |
| July | 18 °C | 29.3 °C | 108.2 mm |
| August | 16.7 °C | 28.6 °C | 82.04 mm |
| September | 12.6 °C | 25.9 °C | 79.76 mm |
| October | 6.2 °C | 19 °C | 86.61 mm |
| November | 0.4 °C | 10.8 °C | 84.33 mm |
| December | -4.4 °C | 3.8 °C | 63.25 mm |
| Annual | 5.7 °C | 16.8 °C | 1037.6 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |