Christopher, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.8 °C (low) to 19.1 °C (high). Annual precipitation averages 1175 Millimeters. Christopher is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 4.7 °C | 80.01 mm |
| February | -2.8 °C | 7.4 °C | 72.9 mm |
| March | 1.9 °C | 13.1 °C | 103.63 mm |
| April | 7.6 °C | 19.7 °C | 133.1 mm |
| May | 13.3 °C | 24.7 °C | 133.35 mm |
| June | 18.1 °C | 29.5 °C | 120.14 mm |
| July | 20 °C | 31 °C | 98.3 mm |
| August | 18.7 °C | 30.5 °C | 76.96 mm |
| September | 14.1 °C | 27.2 °C | 81.28 mm |
| October | 7.7 °C | 20.9 °C | 86.36 mm |
| November | 2.1 °C | 13.2 °C | 104.9 mm |
| December | -2.3 °C | 7 °C | 84.07 mm |
| Annual | 7.8 °C | 19.1 °C | 1175 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |