Prince Rupert, British Columbia climate data is summarized below. Average annual temperatures range from 5.3 °C (low) to 8.8 °C (high). Annual precipitation averages 2454 Millimeters. Prince Rupert is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.29 °C | 4.37 °C | 282 mm |
| February | 1.17 °C | 4.51 °C | 215 mm |
| March | 1.78 °C | 5.23 °C | 221 mm |
| April | 3.65 °C | 7.59 °C | 165 mm |
| May | 6.48 °C | 10.32 °C | 108 mm |
| June | 8.74 °C | 12.4 °C | 103 mm |
| July | 10.71 °C | 14.22 °C | 83 mm |
| August | 10.93 °C | 14.59 °C | 147 mm |
| September | 9.23 °C | 12.77 °C | 238 mm |
| October | 6.62 °C | 9.66 °C | 356 mm |
| November | 2.99 °C | 5.9 °C | 294 mm |
| December | 0.44 °C | 3.48 °C | 242 mm |
| Annual | 5.3 °C | 8.8 °C | 2454 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |