Bowen, 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 16.9 °C (high). Annual precipitation averages 1009.1 Millimeters. Bowen 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.4 °C | 1 °C | 46.23 mm |
| February | -6.3 °C | 3.8 °C | 49.78 mm |
| March | -0.9 °C | 10.4 °C | 65.28 mm |
| April | 5.2 °C | 17.4 °C | 103.38 mm |
| May | 11.5 °C | 23.1 °C | 132.84 mm |
| June | 16.8 °C | 28.1 °C | 124.46 mm |
| July | 18.8 °C | 30.2 °C | 102.11 mm |
| August | 17.5 °C | 29.2 °C | 99.06 mm |
| September | 12.8 °C | 25.9 °C | 89.15 mm |
| October | 6.3 °C | 18.9 °C | 80.77 mm |
| November | 0.1 °C | 10.8 °C | 66.04 mm |
| December | -5.3 °C | 3.7 °C | 50.04 mm |
| Annual | 5.7 °C | 16.9 °C | 1009.14 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |