Shelburne, Ontario climate data is summarized below. Average annual temperatures range from 1 °C (low) to 10.5 °C (high). Annual precipitation averages 561 Millimeters. 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 | -11.36 °C | -3.99 °C | 1 mm |
| February | -12.59 °C | -4.53 °C | 0 mm |
| March | -7.07 °C | 2.17 °C | 23 mm |
| April | -0.88 °C | 9.8 °C | 42 mm |
| May | 5.53 °C | 17.39 °C | 76 mm |
| June | 10.58 °C | 21.79 °C | 82 mm |
| July | 12.98 °C | 24.3 °C | 105 mm |
| August | 12.3 °C | 23.41 °C | 98 mm |
| September | 8.49 °C | 19.36 °C | 55 mm |
| October | 3.67 °C | 12.29 °C | 42 mm |
| November | -2.1 °C | 5.46 °C | 24 mm |
| December | -7.25 °C | -1.13 °C | 13 mm |
| Annual | 1 °C | 10.5 °C | 561 mm |
| 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 : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |