Vail, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.5 °F (low) to 58.8 °F (high). Annual precipitation averages 33.3 Inches. 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 | 10.4 °F | 28.4 °F | 0.75 in. |
| February | 14.5 °F | 33.2 °F | 0.98 in. |
| March | 25.4 °F | 46.5 °F | 1.85 in. |
| April | 36.2 °F | 60.0 °F | 3.42 in. |
| May | 48.7 °F | 70.9 °F | 4.67 in. |
| June | 59.4 °F | 81.0 °F | 4.96 in. |
| July | 63.2 °F | 83.9 °F | 4.0 in. |
| August | 60.3 °F | 81.8 °F | 4.34 in. |
| September | 51.0 °F | 76.0 °F | 3.19 in. |
| October | 38.9 °F | 63.1 °F | 2.51 in. |
| November | 26.2 °F | 46.7 °F | 1.44 in. |
| December | 16.3 °F | 33.5 °F | 1.21 in. |
| Annual | 37.5 °F | 58.8 °F | 33.32 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |