Sandy Lake, Ontario climate data is summarized below. Average annual temperatures range from 22.5 °F (low) to 40.6 °F (high). Annual precipitation averages 22.1 Inches. 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 | -31.7 °F | -26.2 °F | 0 in. |
| February | -31.3 °F | -24.7 °F | 0 in. |
| March | -27.4 °F | -20 °F | 0 in. |
| April | -22.2 °F | -15 °F | 482.6 in. |
| May | -17.2 °F | -10.6 °F | 1625.6 in. |
| June | -12.7 °F | -6.6 °F | 2667 in. |
| July | -10.9 °F | -5.1 °F | 3276.6 in. |
| August | -11.3 °F | -5.7 °F | 2895.6 in. |
| September | -14 °F | -8.8 °F | 1930.4 in. |
| October | -17.4 °F | -14.1 °F | 1397 in. |
| November | -22.9 °F | -19.5 °F | 0 in. |
| December | -29.8 °F | -25.4 °F | 0 in. |
| Annual | 22.5 °F | 40.6 °F | 22.13 in. |
| 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 : -45°F to -40°F |
| Current Drought Conditions | Normal |