Milford, Iowa has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 55.6 °F (high). Annual precipitation averages 30.2 Inches. Milford is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.0 °F | 24.0 °F | 0.69 in. |
| February | 10.9 °F | 28.3 °F | 0.8 in. |
| March | 22.7 °F | 41.1 °F | 1.55 in. |
| April | 34.9 °F | 56.6 °F | 3.24 in. |
| May | 47.5 °F | 68.9 °F | 4.36 in. |
| June | 58.4 °F | 79.0 °F | 4.68 in. |
| July | 62.2 °F | 83.0 °F | 3.56 in. |
| August | 59.5 °F | 80.2 °F | 3.62 in. |
| September | 51.0 °F | 74.2 °F | 3.16 in. |
| October | 37.9 °F | 60.0 °F | 2.31 in. |
| November | 24.7 °F | 43.3 °F | 1.33 in. |
| December | 13.0 °F | 29.1 °F | 0.92 in. |
| Annual | 35.8 °F | 55.6 °F | 30.22 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Dfb - Humid Continental Mild Summer, Wet All Year |