Picton, Ontario climate data is summarized below. Average annual temperatures range from 3.7 °C (low) to 13.2 °C (high). Annual precipitation averages 569 Millimeters. Picton 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 | -9.58 °C | -1.27 °C | 14 mm |
| February | -10.84 °C | -1.67 °C | 7 mm |
| March | -4.44 °C | 4.93 °C | 33 mm |
| April | 2.29 °C | 12.56 °C | 61 mm |
| May | 8.46 °C | 19.88 °C | 58 mm |
| June | 13.71 °C | 24.21 °C | 76 mm |
| July | 16.52 °C | 26.82 °C | 100 mm |
| August | 16.05 °C | 26.05 °C | 66 mm |
| September | 11.5 °C | 21.74 °C | 41 mm |
| October | 6.13 °C | 14.91 °C | 52 mm |
| November | 0.2 °C | 8.46 °C | 35 mm |
| December | -5.29 °C | 1.82 °C | 26 mm |
| Annual | 3.7 °C | 13.2 °C | 569 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 |
| Current Drought Conditions | Normal |