Milford, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 15.8 °C (high). Annual precipitation averages 1192.5 Millimeters. Milford is located in USDA Plant Hardiness Zone 6b. 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 | -8.7 °C | 1.8 °C | 81.28 mm |
| February | -7.8 °C | 3.7 °C | 65.02 mm |
| March | -3.8 °C | 8.3 °C | 96.77 mm |
| April | 2.2 °C | 15.7 °C | 97.28 mm |
| May | 7.9 °C | 21.7 °C | 93.22 mm |
| June | 13.1 °C | 25.9 °C | 124.71 mm |
| July | 15.7 °C | 28.6 °C | 110.49 mm |
| August | 14.9 °C | 27.5 °C | 112.52 mm |
| September | 10.8 °C | 23.9 °C | 116.84 mm |
| October | 4.4 °C | 17.2 °C | 111.76 mm |
| November | -1.2 °C | 10.6 °C | 83.82 mm |
| December | -5.3 °C | 4.6 °C | 98.81 mm |
| Annual | 3.5 °C | 15.8 °C | 1192.52 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |