Picton, Ontario climate data is summarized below. Average annual temperatures range from 38.7 °F (low) to 55.8 °F (high). Annual precipitation averages 22.4 Inches. 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 | -23.1 °F | -18.5 °F | 355.6 in. |
| February | -23.8 °F | -18.7 °F | 177.8 in. |
| March | -20.2 °F | -15 °F | 838.2 in. |
| April | -16.5 °F | -10.8 °F | 1549.4 in. |
| May | -13.1 °F | -6.7 °F | 1473.2 in. |
| June | -10.2 °F | -4.3 °F | 1930.4 in. |
| July | -8.6 °F | -2.9 °F | 2540 in. |
| August | -8.9 °F | -3.3 °F | 1676.4 in. |
| September | -11.4 °F | -5.7 °F | 1041.4 in. |
| October | -14.4 °F | -9.5 °F | 1320.8 in. |
| November | -17.7 °F | -13.1 °F | 889 in. |
| December | -20.7 °F | -16.8 °F | 660.4 in. |
| Annual | 38.7 °F | 55.8 °F | 22.4 in. |
| 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 : -10°F to -5°F |
| Current Drought Conditions | Normal |