Tavistock, Ontario climate data is summarized below. Average annual temperatures range from 2.6 °C (low) to 12.1 °C (high). Annual precipitation averages 437 Millimeters. Tavistock 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.91 °C | -2.65 °C | 3 mm |
| February | -11.37 °C | -3.05 °C | 0 mm |
| March | -5.46 °C | 4 °C | 21 mm |
| April | 1 °C | 11.82 °C | 28 mm |
| May | 7.46 °C | 19.08 °C | 47 mm |
| June | 12.44 °C | 23.7 °C | 72 mm |
| July | 14.3 °C | 25.75 °C | 86 mm |
| August | 13.82 °C | 24.74 °C | 79 mm |
| September | 9.79 °C | 20.8 °C | 55 mm |
| October | 4.79 °C | 13.96 °C | 26 mm |
| November | -0.74 °C | 6.82 °C | 15 mm |
| December | -5.46 °C | 0.4 °C | 5 mm |
| Annual | 2.6 °C | 12.1 °C | 437 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |