Sandy Lake, Ontario climate data is summarized below. Average annual temperatures range from -5.3 °C (low) to 4.8 °C (high). Annual precipitation averages 562 Millimeters. Sandy Lake is located in USDA Plant Hardiness Zone 2b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -25.05 °C | -15.2 °C | 0 mm |
| February | -24.41 °C | -12.47 °C | 0 mm |
| March | -17.27 °C | -4.01 °C | 0 mm |
| April | -7.88 °C | 5.05 °C | 19 mm |
| May | 1.11 °C | 12.97 °C | 64 mm |
| June | 9.12 °C | 20.13 °C | 105 mm |
| July | 12.38 °C | 22.86 °C | 129 mm |
| August | 11.68 °C | 21.77 °C | 114 mm |
| September | 6.79 °C | 16.14 °C | 76 mm |
| October | 0.77 °C | 6.71 °C | 55 mm |
| November | -9.15 °C | -3.14 °C | 0 mm |
| December | -21.71 °C | -13.73 °C | 0 mm |
| Annual | -5.3 °C | 4.8 °C | 562 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 2b : -42.8°C to -40°C |
| Current Drought Conditions | Normal |