Milford, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.2 °F (low) to 54.3 °F (high). Annual precipitation averages 42.1 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 | 7.1 °F | 27.8 °F | 3.39 in. |
| February | 8.6 °F | 30.7 °F | 2.56 in. |
| March | 19.7 °F | 39.3 °F | 3.3 in. |
| April | 31.2 °F | 52.1 °F | 3.4 in. |
| May | 41.6 °F | 64.6 °F | 3.24 in. |
| June | 50.7 °F | 73.9 °F | 3.73 in. |
| July | 57.0 °F | 79.4 °F | 3.17 in. |
| August | 55.0 °F | 78.2 °F | 3.12 in. |
| September | 47.2 °F | 70.1 °F | 3.46 in. |
| October | 36.5 °F | 56.9 °F | 4.47 in. |
| November | 27.7 °F | 45.0 °F | 3.85 in. |
| December | 16.1 °F | 34.0 °F | 4.38 in. |
| Annual | 33.2 °F | 54.3 °F | 42.07 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 |