North West River, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from -4.5 °C (low) to 3.4 °C (high). Annual precipitation averages 517 Millimeters. North West River is located in USDA Plant Hardiness Zone 2b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.77 °C | -12.41 °C | 0 mm |
| February | -21.13 °C | -10.87 °C | 0 mm |
| March | -17.8 °C | -6.21 °C | 0 mm |
| April | -7.77 °C | 1.24 °C | 10 mm |
| May | -0.87 °C | 6.69 °C | 58 mm |
| June | 6.26 °C | 14.04 °C | 77 mm |
| July | 10.79 °C | 18.34 °C | 76 mm |
| August | 11.43 °C | 18.75 °C | 80 mm |
| September | 5.97 °C | 13.08 °C | 99 mm |
| October | 1.4 °C | 6.56 °C | 79 mm |
| November | -5.43 °C | -0.22 °C | 38 mm |
| December | -15.68 °C | -8.5 °C | 0 mm |
| Annual | -4.5 °C | 3.4 °C | 517 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 2b : -42.8°C to -40°C |
| Current Drought Conditions | Abnormally Dry |