Port Rexton, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.7 °C (low) to 7.2 °C (high). Annual precipitation averages 915 Millimeters. Port Rexton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.04 °C | -0.98 °C | 44 mm |
| February | -6.75 °C | -1.82 °C | 44 mm |
| March | -5.08 °C | -0.78 °C | 42 mm |
| April | -1.45 °C | 2.48 °C | 60 mm |
| May | 2.59 °C | 7.03 °C | 77 mm |
| June | 6.87 °C | 11.45 °C | 70 mm |
| July | 11.92 °C | 17.04 °C | 79 mm |
| August | 13.44 °C | 18.02 °C | 88 mm |
| September | 10.44 °C | 15.31 °C | 104 mm |
| October | 6.45 °C | 10.5 °C | 113 mm |
| November | 2.06 °C | 6.13 °C | 104 mm |
| December | -2.55 °C | 1.88 °C | 90 mm |
| Annual | 2.7 °C | 7.2 °C | 915 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |