Ava, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.9 °C (low) to 19.1 °C (high). Annual precipitation averages 1165.4 Millimeters. Ava is located in USDA Plant Hardiness Zone 7a. 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 | -4.4 °C | 5.1 °C | 75.95 mm |
| February | -2.7 °C | 8 °C | 71.88 mm |
| March | 2 °C | 13.4 °C | 102.62 mm |
| April | 7.6 °C | 19.6 °C | 130.56 mm |
| May | 13.3 °C | 24.5 °C | 134.11 mm |
| June | 17.9 °C | 29.3 °C | 116.84 mm |
| July | 20.1 °C | 30.7 °C | 100.84 mm |
| August | 18.7 °C | 30.3 °C | 78.23 mm |
| September | 14.2 °C | 27.1 °C | 81.79 mm |
| October | 7.9 °C | 21 °C | 87.38 mm |
| November | 2.3 °C | 13.4 °C | 102.87 mm |
| December | -2.4 °C | 7.3 °C | 82.3 mm |
| Annual | 7.9 °C | 19.1 °C | 1165.37 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |