Cranbrook, British Columbia climate data is summarized below. Average annual temperatures range from 1.1 °C (low) to 12.1 °C (high). Annual precipitation averages 223 Millimeters. Cranbrook is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.38 °C | -0.6 °C | 0 mm |
| February | -6.75 °C | 1.89 °C | 0 mm |
| March | -2.64 °C | 6.42 °C | 0 mm |
| April | 0.34 °C | 11.71 °C | 17 mm |
| May | 4.72 °C | 17.53 °C | 44 mm |
| June | 8.53 °C | 21.21 °C | 55 mm |
| July | 12.04 °C | 26.95 °C | 29 mm |
| August | 10.96 °C | 26.2 °C | 23 mm |
| September | 6.53 °C | 20.32 °C | 22 mm |
| October | 1.35 °C | 12.25 °C | 29 mm |
| November | -4.05 °C | 3.79 °C | 4 mm |
| December | -9.23 °C | -2.21 °C | 0 mm |
| Annual | 1.1 °C | 12.1 °C | 223 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |