Arenzville, 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 17.6 °C (high). Annual precipitation averages 994.9 Millimeters. Arenzville 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 | -7.8 °C | 1.8 °C | 52.83 mm |
| February | -6 °C | 4.6 °C | 47.75 mm |
| March | -0.8 °C | 11.1 °C | 66.8 mm |
| April | 5 °C | 18.3 °C | 100.84 mm |
| May | 11.5 °C | 23.8 °C | 121.41 mm |
| June | 16.7 °C | 28.6 °C | 119.89 mm |
| July | 18.6 °C | 30.3 °C | 100.58 mm |
| August | 17.1 °C | 29.7 °C | 89.15 mm |
| September | 12.6 °C | 26.6 °C | 86.87 mm |
| October | 5.9 °C | 19.7 °C | 77.98 mm |
| November | 0.2 °C | 11.5 °C | 74.93 mm |
| December | -4.6 °C | 4.8 °C | 55.88 mm |
| Annual | 5.7 °C | 17.6 °C | 994.91 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 |