Surprise, British Columbia climate data is summarized below. Average annual temperatures range from 21.5 °F (low) to 34 °F (high). Annual precipitation averages 9.2 Inches. Surprise is located in USDA Plant Hardiness Zone 1b. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.5 °F | -22.8 °F | 0 in. |
| February | -26.6 °F | -22.2 °F | 0 in. |
| March | -26.6 °F | -21.6 °F | 0 in. |
| April | -22.4 °F | -18.2 °F | 0 in. |
| May | -18.3 °F | -13.8 °F | 533.4 in. |
| June | -15.7 °F | -10.8 °F | 1066.8 in. |
| July | -14.6 °F | -10 °F | 1143 in. |
| August | -15 °F | -10.7 °F | 1066.8 in. |
| September | -17.1 °F | -14 °F | 1447.8 in. |
| October | -19.3 °F | -17.4 °F | 685.8 in. |
| November | -24.1 °F | -21.5 °F | 0 in. |
| December | -26.2 °F | -22.9 °F | 0 in. |
| Annual | 21.5 °F | 34 °F | 9.2 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 1b : -55°F to -50°F |
| Current Drought Conditions | Normal |