Milford, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.1 °C (low) to 15.9 °C (high). Annual precipitation averages 1240.3 Millimeters. Milford is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 3.7 °C | 90.93 mm |
| February | -4.1 °C | 4.7 °C | 79.25 mm |
| March | -0.3 °C | 8.4 °C | 114.3 mm |
| April | 5 °C | 14.3 °C | 110.49 mm |
| May | 10.4 °C | 19.8 °C | 98.04 mm |
| June | 15.8 °C | 24.8 °C | 111 mm |
| July | 19.3 °C | 28 °C | 89.15 mm |
| August | 18.7 °C | 27.2 °C | 102.87 mm |
| September | 14.7 °C | 23.9 °C | 113.54 mm |
| October | 8.5 °C | 17.8 °C | 122.68 mm |
| November | 2.9 °C | 11.9 °C | 98.55 mm |
| December | -1.4 °C | 6.6 °C | 109.47 mm |
| Annual | 7.1 °C | 15.9 °C | 1240.27 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |