South Woodstock, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.3 °C (low) to 15.5 °C (high). Annual precipitation averages 1264.7 Millimeters. South Woodstock is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | 2.2 °C | 97.79 mm |
| February | -8.1 °C | 3.6 °C | 85.6 mm |
| March | -3.9 °C | 7.8 °C | 112.27 mm |
| April | 1.6 °C | 14.9 °C | 111.76 mm |
| May | 7.1 °C | 20.8 °C | 88.65 mm |
| June | 12.2 °C | 25.2 °C | 108.97 mm |
| July | 15.7 °C | 28.1 °C | 100.84 mm |
| August | 14.4 °C | 27.1 °C | 108.46 mm |
| September | 10.7 °C | 23.3 °C | 108.71 mm |
| October | 4.4 °C | 16.8 °C | 122.68 mm |
| November | -0.9 °C | 10.8 °C | 101.09 mm |
| December | -5.4 °C | 5.1 °C | 117.86 mm |
| Annual | 3.3 °C | 15.5 °C | 1264.68 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |