Milo, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 15.7 °C (high). Annual precipitation averages 940.1 Millimeters. Milo is located in USDA Plant Hardiness Zone 5b. 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 | -10.5 °C | -0.5 °C | 25.15 mm |
| February | -8.3 °C | 2 °C | 34.54 mm |
| March | -2.3 °C | 9.2 °C | 53.09 mm |
| April | 3.9 °C | 16.4 °C | 97.54 mm |
| May | 10.5 °C | 22 °C | 134.62 mm |
| June | 16.1 °C | 27.3 °C | 133.86 mm |
| July | 18.4 °C | 29.5 °C | 110.74 mm |
| August | 16.9 °C | 28.6 °C | 105.66 mm |
| September | 11.9 °C | 24.9 °C | 93.47 mm |
| October | 5.2 °C | 17.8 °C | 68.07 mm |
| November | -1.4 °C | 9.4 °C | 48.01 mm |
| December | -7.3 °C | 2.3 °C | 35.31 mm |
| Annual | 4.4 °C | 15.7 °C | 940.06 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 5b : -26.1°C to -23.3°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 |