Woodstock, Ontario climate data is summarized below. Average annual temperatures range from 3.1 °C (low) to 12.7 °C (high). Annual precipitation averages 418 Millimeters. Woodstock is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.24 °C | -2.02 °C | 3 mm |
| February | -10.52 °C | -2.47 °C | 0 mm |
| March | -4.48 °C | 4.64 °C | 22 mm |
| April | 1.51 °C | 12.49 °C | 29 mm |
| May | 7.88 °C | 19.63 °C | 43 mm |
| June | 12.96 °C | 24.21 °C | 60 mm |
| July | 14.93 °C | 26.34 °C | 85 mm |
| August | 14.32 °C | 25.48 °C | 78 mm |
| September | 10.18 °C | 21.52 °C | 52 mm |
| October | 5.08 °C | 14.62 °C | 25 mm |
| November | -0.42 °C | 7.42 °C | 15 mm |
| December | -4.97 °C | 1.04 °C | 6 mm |
| Annual | 3.1 °C | 12.7 °C | 418 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |