Atnarko, British Columbia climate data is summarized below. Average annual temperatures range from -2.3 °C (low) to 6.1 °C (high). Annual precipitation averages 359 Millimeters. 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 | -9.2 °C | -2.27 °C | 0 mm |
| February | -9.38 °C | -1.28 °C | 0 mm |
| March | -9.52 °C | -0.28 °C | 0 mm |
| April | -5.12 °C | 3.15 °C | 9 mm |
| May | 0.29 °C | 9.69 °C | 45 mm |
| June | 3.61 °C | 12.55 °C | 59 mm |
| July | 6.54 °C | 16.67 °C | 40 mm |
| August | 6.57 °C | 17.13 °C | 47 mm |
| September | 3.83 °C | 13.69 °C | 59 mm |
| October | 0.08 °C | 7.1 °C | 75 mm |
| November | -5.65 °C | 0.22 °C | 25 mm |
| December | -9.88 °C | -3.21 °C | 0 mm |
| Annual | -2.3 °C | 6.1 °C | 359 mm |
| 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 : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |