Atnarko, British Columbia climate data is summarized below. Average annual temperatures range from 27.8 °F (low) to 43 °F (high). Annual precipitation averages 14.1 Inches. Atnarko is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -22.9 °F | -19 °F | 0 in. |
| February | -23 °F | -18.5 °F | 0 in. |
| March | -23.1 °F | -17.9 °F | 0 in. |
| April | -20.6 °F | -16 °F | 228.6 in. |
| May | -17.6 °F | -12.4 °F | 1143 in. |
| June | -15.8 °F | -10.8 °F | 1498.6 in. |
| July | -14.1 °F | -8.5 °F | 1016 in. |
| August | -14.1 °F | -8.3 °F | 1193.8 in. |
| September | -15.7 °F | -10.2 °F | 1498.6 in. |
| October | -17.7 °F | -13.8 °F | 1905 in. |
| November | -20.9 °F | -17.7 °F | 635 in. |
| December | -23.3 °F | -19.6 °F | 0 in. |
| Annual | 27.8 °F | 43 °F | 14.11 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |