Pomfret, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 15.3 °C (high). Annual precipitation averages 1246.6 Millimeters. Pomfret 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 | -8.2 °C | 2.2 °C | 94.74 mm |
| February | -7.7 °C | 3.5 °C | 84.07 mm |
| March | -3.5 °C | 7.8 °C | 112.01 mm |
| April | 2 °C | 14.7 °C | 108.71 mm |
| May | 7.6 °C | 20.6 °C | 88.9 mm |
| June | 12.7 °C | 25 °C | 106.68 mm |
| July | 16.1 °C | 27.8 °C | 98.81 mm |
| August | 14.9 °C | 26.8 °C | 109.47 mm |
| September | 11.1 °C | 23.1 °C | 107.95 mm |
| October | 5.1 °C | 16.7 °C | 121.67 mm |
| November | -0.4 °C | 10.7 °C | 98.81 mm |
| December | -4.8 °C | 5.1 °C | 114.81 mm |
| Annual | 3.7 °C | 15.3 °C | 1246.63 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |