Northern Arm, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 0.5 °C (low) to 7.9 °C (high). Annual precipitation averages 805 Millimeters. Northern Arm is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.73 °C | -3.3 °C | 22 mm |
| February | -10.39 °C | -3.64 °C | 26 mm |
| March | -8.57 °C | -1.88 °C | 23 mm |
| April | -3.12 °C | 3.41 °C | 48 mm |
| May | 1.71 °C | 10.23 °C | 72 mm |
| June | 6.62 °C | 15.98 °C | 77 mm |
| July | 11.74 °C | 21.9 °C | 89 mm |
| August | 11.77 °C | 21.3 °C | 103 mm |
| September | 8.06 °C | 16.59 °C | 103 mm |
| October | 3.9 °C | 10.09 °C | 106 mm |
| November | -0.59 °C | 4.63 °C | 87 mm |
| December | -5.53 °C | -0.42 °C | 49 mm |
| Annual | 0.5 °C | 7.9 °C | 805 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |