Summit Lake, British Columbia climate data is summarized below. Average annual temperatures range from 0.3 °C (low) to 9.8 °C (high). Annual precipitation averages 409 Millimeters. Summit Lake is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.12 °C | -0.65 °C | 0 mm |
| February | -7.08 °C | 1.1 °C | 0 mm |
| March | -4.84 °C | 3.75 °C | 0 mm |
| April | -1.76 °C | 7.16 °C | 19 mm |
| May | 2.9 °C | 12.73 °C | 56 mm |
| June | 7.23 °C | 18.43 °C | 86 mm |
| July | 10.8 °C | 23.5 °C | 40 mm |
| August | 10.09 °C | 23.21 °C | 31 mm |
| September | 5.97 °C | 17.95 °C | 58 mm |
| October | 1.18 °C | 10.43 °C | 93 mm |
| November | -4.46 °C | 2.35 °C | 26 mm |
| December | -8.79 °C | -1.94 °C | 0 mm |
| Annual | 0.3 °C | 9.8 °C | 409 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |