New Milford, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.6 °F (low) to 60.7 °F (high). Annual precipitation averages 49 Inches. New Milford is located in USDA Plant Hardiness Zone 6b. 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 | 17.5 °F | 35.6 °F | 3.41 in. |
| February | 19.2 °F | 38.8 °F | 2.81 in. |
| March | 26.7 °F | 46.8 °F | 3.82 in. |
| April | 36.8 °F | 60.1 °F | 3.83 in. |
| May | 47.4 °F | 70.9 °F | 3.82 in. |
| June | 56.5 °F | 79.4 °F | 4.56 in. |
| July | 61.8 °F | 84.3 °F | 4.4 in. |
| August | 60.5 °F | 82.4 °F | 4.86 in. |
| September | 52.7 °F | 75.0 °F | 4.54 in. |
| October | 40.9 °F | 63.1 °F | 4.96 in. |
| November | 31.1 °F | 51.5 °F | 3.79 in. |
| December | 23.5 °F | 40.2 °F | 4.18 in. |
| Annual | 39.6 °F | 60.7 °F | 48.98 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |