Shelburne, Ontario climate data is summarized below. Average annual temperatures range from 33.9 °F (low) to 50.9 °F (high). Annual precipitation averages 22.1 Inches. Shelburne is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -24.1 °F | -20 °F | 25.4 in. |
| February | -24.8 °F | -20.3 °F | 0 in. |
| March | -21.7 °F | -16.6 °F | 584.2 in. |
| April | -18.3 °F | -12.3 °F | 1066.8 in. |
| May | -14.7 °F | -8.1 °F | 1930.4 in. |
| June | -11.9 °F | -5.7 °F | 2082.8 in. |
| July | -10.6 °F | -4.3 °F | 2667 in. |
| August | -10.9 °F | -4.8 °F | 2489.2 in. |
| September | -13.1 °F | -7 °F | 1397 in. |
| October | -15.7 °F | -11 °F | 1066.8 in. |
| November | -18.9 °F | -14.7 °F | 609.6 in. |
| December | -21.8 °F | -18.4 °F | 330.2 in. |
| Annual | 33.9 °F | 50.9 °F | 22.08 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |