Miles, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.4 °C (low) to 14.6 °C (high). Annual precipitation averages 965.2 Millimeters. 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 | -11.4 °C | -2 °C | 37.34 mm |
| February | -9.3 °C | 0.4 °C | 42.67 mm |
| March | -3.3 °C | 7.6 °C | 58.93 mm |
| April | 2.8 °C | 15.1 °C | 94.74 mm |
| May | 9.3 °C | 21.4 °C | 113.79 mm |
| June | 14.9 °C | 26.6 °C | 133.6 mm |
| July | 16.8 °C | 28.3 °C | 111.76 mm |
| August | 15.6 °C | 27.3 °C | 101.85 mm |
| September | 10.9 °C | 23.9 °C | 92.46 mm |
| October | 4.4 °C | 16.7 °C | 73.41 mm |
| November | -1.9 °C | 8.2 °C | 57.4 mm |
| December | -7.8 °C | 1.1 °C | 47.24 mm |
| Annual | 3.4 °C | 14.6 °C | 965.19 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |