Rossland, British Columbia climate data is summarized below. Average annual temperatures range from 0.7 °C (low) to 9.7 °C (high). Annual precipitation averages 51 Millimeters. 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 | -8.21 °C | -1.79 °C | 0 mm |
| February | -6.62 °C | 0.35 °C | 0 mm |
| March | -4.55 °C | 3.53 °C | 5 mm |
| April | -0.93 °C | 8.64 °C | 4 mm |
| May | 3.86 °C | 14.41 °C | 8 mm |
| June | 7.3 °C | 17.52 °C | 10 mm |
| July | 11.1 °C | 23.47 °C | 13 mm |
| August | 10.71 °C | 23.38 °C | 6 mm |
| September | 6.38 °C | 17.94 °C | 3 mm |
| October | 1.43 °C | 9.85 °C | 1 mm |
| November | -3.96 °C | 1.81 °C | 0 mm |
| December | -8.71 °C | -2.63 °C | 1 mm |
| Annual | 0.7 °C | 9.7 °C | 51 mm |
| 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 : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |