North West River, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 24 °F (low) to 38.1 °F (high). Annual precipitation averages 20.4 Inches. 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 | -29.3 °F | -24.7 °F | 0 in. |
| February | -29.5 °F | -23.8 °F | 0 in. |
| March | -27.7 °F | -21.2 °F | 0 in. |
| April | -22.1 °F | -17.1 °F | 254 in. |
| May | -18.3 °F | -14.1 °F | 1473.2 in. |
| June | -14.3 °F | -10 °F | 1955.8 in. |
| July | -11.8 °F | -7.6 °F | 1930.4 in. |
| August | -11.4 °F | -7.4 °F | 2032 in. |
| September | -14.5 °F | -10.5 °F | 2514.6 in. |
| October | -17 °F | -14.1 °F | 2006.6 in. |
| November | -20.8 °F | -17.9 °F | 965.2 in. |
| December | -26.5 °F | -22.5 °F | 0 in. |
| Annual | 24 °F | 38.1 °F | 20.35 in. |
| 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 : -45°F to -40°F |
| Current Drought Conditions | Abnormally Dry |