Vinton, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.3 °F (low) to 58.7 °F (high). Annual precipitation averages 37.8 Inches. Vinton 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 | 10.9 °F | 27.8 °F | 1.17 in. |
| February | 14.9 °F | 32.4 °F | 1.26 in. |
| March | 26.2 °F | 45.6 °F | 2.1 in. |
| April | 37.4 °F | 60.4 °F | 3.82 in. |
| May | 49.5 °F | 71.6 °F | 4.89 in. |
| June | 60.0 °F | 81.0 °F | 5.5 in. |
| July | 63.3 °F | 84.2 °F | 4.36 in. |
| August | 60.6 °F | 82.3 °F | 4.31 in. |
| September | 52.0 °F | 76.2 °F | 3.71 in. |
| October | 40.0 °F | 63.0 °F | 2.98 in. |
| November | 27.9 °F | 46.8 °F | 2.1 in. |
| December | 17.3 °F | 33.5 °F | 1.58 in. |
| Annual | 38.3 °F | 58.7 °F | 37.78 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |