Cranbrook, British Columbia climate data is summarized below. Average annual temperatures range from 34 °F (low) to 53.8 °F (high). Annual precipitation averages 8.8 Inches. 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 | -22.4 °F | -18.1 °F | 0 in. |
| February | -21.5 °F | -16.7 °F | 0 in. |
| March | -19.2 °F | -14.2 °F | 0 in. |
| April | -17.6 °F | -11.3 °F | 431.8 in. |
| May | -15.2 °F | -8 °F | 1117.6 in. |
| June | -13 °F | -6 °F | 1397 in. |
| July | -11.1 °F | -2.8 °F | 736.6 in. |
| August | -11.7 °F | -3.2 °F | 584.2 in. |
| September | -14.2 °F | -6.5 °F | 558.8 in. |
| October | -17 °F | -11 °F | 736.6 in. |
| November | -20 °F | -15.7 °F | 101.6 in. |
| December | -22.9 °F | -19 °F | 0 in. |
| Annual | 34 °F | 53.8 °F | 8.79 in. |
| 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 : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |