Vail, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.1 °C (low) to 14.9 °C (high). Annual precipitation averages 846.3 Millimeters. Vail is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12 °C | -2 °C | 19.05 mm |
| February | -9.7 °C | 0.7 °C | 24.89 mm |
| March | -3.7 °C | 8.1 °C | 46.99 mm |
| April | 2.3 °C | 15.6 °C | 86.87 mm |
| May | 9.3 °C | 21.6 °C | 118.62 mm |
| June | 15.2 °C | 27.2 °C | 125.98 mm |
| July | 17.3 °C | 28.8 °C | 101.6 mm |
| August | 15.7 °C | 27.7 °C | 110.24 mm |
| September | 10.6 °C | 24.4 °C | 81.03 mm |
| October | 3.8 °C | 17.3 °C | 63.75 mm |
| November | -3.2 °C | 8.2 °C | 36.58 mm |
| December | -8.7 °C | 0.8 °C | 30.73 mm |
| Annual | 3.1 °C | 14.9 °C | 846.33 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |