Woodstock, Ontario climate data is summarized below. Average annual temperatures range from 37.6 °F (low) to 55 °F (high). Annual precipitation averages 16.5 Inches. 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 | -22.9 °F | -18.9 °F | 76.2 in. |
| February | -23.6 °F | -19.2 °F | 0 in. |
| March | -20.3 °F | -15.2 °F | 558.8 in. |
| April | -16.9 °F | -10.8 °F | 736.6 in. |
| May | -13.4 °F | -6.9 °F | 1092.2 in. |
| June | -10.6 °F | -4.3 °F | 1524 in. |
| July | -9.5 °F | -3.1 °F | 2159 in. |
| August | -9.8 °F | -3.6 °F | 1981.2 in. |
| September | -12.1 °F | -5.8 °F | 1320.8 in. |
| October | -15 °F | -9.7 °F | 635 in. |
| November | -18 °F | -13.7 °F | 381 in. |
| December | -20.5 °F | -17.2 °F | 152.4 in. |
| Annual | 37.6 °F | 55 °F | 16.46 in. |
| 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 : -10°F to -5°F |
| Current Drought Conditions | Normal |