Grand Forks, British Columbia climate data is summarized below. Average annual temperatures range from 1.6 °C (low) to 16.1 °C (high). Annual precipitation averages 57 Millimeters. Grand Forks is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.31 °C | 1.32 °C | 0 mm |
| February | -6.32 °C | 5.08 °C | 0 mm |
| March | -3.88 °C | 9.79 °C | 3 mm |
| April | 0.51 °C | 15.8 °C | 4 mm |
| May | 5.7 °C | 22.23 °C | 10 mm |
| June | 9.11 °C | 25.52 °C | 12 mm |
| July | 12.21 °C | 31.52 °C | 17 mm |
| August | 11.46 °C | 31.29 °C | 6 mm |
| September | 6.78 °C | 25.56 °C | 3 mm |
| October | 2.32 °C | 16.84 °C | 2 mm |
| November | -2.38 °C | 7.08 °C | 0 mm |
| December | -7.72 °C | 1.63 °C | 0 mm |
| Annual | 1.6 °C | 16.1 °C | 57 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |