Miles, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.2 °F (low) to 58.2 °F (high). Annual precipitation averages 38 Inches. Miles 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.5 °F | 28.4 °F | 1.47 in. |
| February | 15.2 °F | 32.8 °F | 1.68 in. |
| March | 26.1 °F | 45.6 °F | 2.32 in. |
| April | 37.0 °F | 59.1 °F | 3.73 in. |
| May | 48.8 °F | 70.6 °F | 4.48 in. |
| June | 58.9 °F | 79.9 °F | 5.26 in. |
| July | 62.3 °F | 83.0 °F | 4.4 in. |
| August | 60.0 °F | 81.1 °F | 4.01 in. |
| September | 51.6 °F | 75.1 °F | 3.64 in. |
| October | 40.0 °F | 62.1 °F | 2.89 in. |
| November | 28.5 °F | 46.8 °F | 2.26 in. |
| December | 17.9 °F | 33.9 °F | 1.86 in. |
| Annual | 38.2 °F | 58.2 °F | 38 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |