Xenia, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 18.5 °C (high). Annual precipitation averages 1164.3 Millimeters. Xenia is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.4 °C | 3.7 °C | 81.53 mm |
| February | -3.6 °C | 6.3 °C | 65.28 mm |
| March | 1.1 °C | 12.1 °C | 94.49 mm |
| April | 6.9 °C | 19.1 °C | 122.43 mm |
| May | 12.9 °C | 24.3 °C | 127.51 mm |
| June | 17.8 °C | 29.2 °C | 125.73 mm |
| July | 19.5 °C | 30.8 °C | 105.92 mm |
| August | 18.1 °C | 30.3 °C | 90.93 mm |
| September | 13.6 °C | 27 °C | 84.07 mm |
| October | 7.3 °C | 20.6 °C | 87.38 mm |
| November | 1.7 °C | 12.4 °C | 100.33 mm |
| December | -2.8 °C | 6 °C | 78.74 mm |
| Annual | 7.3 °C | 18.5 °C | 1164.34 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |