Grand Forks, British Columbia climate data is summarized below. Average annual temperatures range from 34.9 °F (low) to 61 °F (high). Annual precipitation averages 2.3 Inches. 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 | -22.4 °F | -17 °F | 0 in. |
| February | -21.3 °F | -15 °F | 0 in. |
| March | -19.9 °F | -12.3 °F | 76.2 in. |
| April | -17.5 °F | -9 °F | 101.6 in. |
| May | -14.6 °F | -5.4 °F | 254 in. |
| June | -12.7 °F | -3.6 °F | 304.8 in. |
| July | -11 °F | -0.3 °F | 431.8 in. |
| August | -11.4 °F | -0.4 °F | 152.4 in. |
| September | -14 °F | -3.6 °F | 76.2 in. |
| October | -16.5 °F | -8.4 °F | 50.8 in. |
| November | -19.1 °F | -13.8 °F | 0 in. |
| December | -22.1 °F | -16.9 °F | 0 in. |
| Annual | 34.9 °F | 61 °F | 2.25 in. |
| 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 : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |