Rossland, British Columbia climate data is summarized below. Average annual temperatures range from 33.2 °F (low) to 49.5 °F (high). Annual precipitation averages 2 Inches. Rossland is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -22.3 °F | -18.8 °F | 0 in. |
| February | -21.5 °F | -17.6 °F | 0 in. |
| March | -20.3 °F | -15.8 °F | 127 in. |
| April | -18.3 °F | -13 °F | 101.6 in. |
| May | -15.6 °F | -9.8 °F | 203.2 in. |
| June | -13.7 °F | -8 °F | 254 in. |
| July | -11.6 °F | -4.7 °F | 330.2 in. |
| August | -11.8 °F | -4.8 °F | 152.4 in. |
| September | -14.2 °F | -7.8 °F | 76.2 in. |
| October | -17 °F | -12.3 °F | 25.4 in. |
| November | -20 °F | -16.8 °F | 0 in. |
| December | -22.6 °F | -19.2 °F | 25.4 in. |
| Annual | 33.2 °F | 49.5 °F | 2.01 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |