Mission, British Columbia climate data is summarized below. Average annual temperatures range from 5.9 °C (low) to 13.8 °C (high). Annual precipitation averages 1403 Millimeters. Mission is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.42 °C | 4.71 °C | 160 mm |
| February | 1.04 °C | 6.86 °C | 115 mm |
| March | 1.9 °C | 9.09 °C | 163 mm |
| April | 4.08 °C | 13.13 °C | 83 mm |
| May | 7.89 °C | 17.6 °C | 67 mm |
| June | 10.55 °C | 19.97 °C | 54 mm |
| July | 13.04 °C | 23.96 °C | 40 mm |
| August | 13.19 °C | 24.08 °C | 45 mm |
| September | 10.5 °C | 20.45 °C | 102 mm |
| October | 6.63 °C | 14.14 °C | 213 mm |
| November | 2.48 °C | 7.98 °C | 213 mm |
| December | -0.42 °C | 4 °C | 148 mm |
| Annual | 5.9 °C | 13.8 °C | 1403 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |