Chetwynd, British Columbia climate data is summarized below. Average annual temperatures range from -2.4 °C (low) to 6.8 °C (high). Annual precipitation averages 382 Millimeters. Chetwynd is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.3 °C | -5.14 °C | 0 mm |
| February | -12.32 °C | -3.88 °C | 0 mm |
| March | -10.59 °C | -0.89 °C | 0 mm |
| April | -2.81 °C | 6.37 °C | 24 mm |
| May | 2.63 °C | 13.89 °C | 61 mm |
| June | 7.04 °C | 17.52 °C | 98 mm |
| July | 9.61 °C | 20.79 °C | 67 mm |
| August | 8.49 °C | 20.04 °C | 57 mm |
| September | 4.66 °C | 14.92 °C | 43 mm |
| October | -0.35 °C | 6.64 °C | 32 mm |
| November | -8.87 °C | -2.35 °C | 0 mm |
| December | -14.09 °C | -6.79 °C | 0 mm |
| Annual | -2.4 °C | 6.8 °C | 382 mm |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Moderate Drought |