Woodstock, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.3 °C (low) to 14.3 °C (high). Annual precipitation averages 1251 Millimeters. Woodstock 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 | -7.9 °C | 1.1 °C | 94.49 mm |
| February | -7.4 °C | 2.4 °C | 84.58 mm |
| March | -3.3 °C | 6.7 °C | 110.24 mm |
| April | 2.6 °C | 13.6 °C | 107.7 mm |
| May | 8.3 °C | 19.6 °C | 92.2 mm |
| June | 13.6 °C | 24 °C | 106.43 mm |
| July | 16.6 °C | 26.9 °C | 102.36 mm |
| August | 15.8 °C | 25.8 °C | 111 mm |
| September | 11.9 °C | 22 °C | 108.46 mm |
| October | 5.6 °C | 15.4 °C | 121.92 mm |
| November | 0.4 °C | 9.6 °C | 96.52 mm |
| December | -4.3 °C | 3.9 °C | 115.06 mm |
| Annual | 4.3 °C | 14.3 °C | 1250.96 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 |