Mount Pearl, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 3.2 °C (low) to 7.7 °C (high). Annual precipitation averages 993 Millimeters. Mount Pearl 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 Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.79 °C | 0.12 °C | 67 mm |
| February | -5.52 °C | -0.86 °C | 68 mm |
| March | -4.14 °C | -0.09 °C | 61 mm |
| April | -0.9 °C | 3.17 °C | 71 mm |
| May | 2.81 °C | 7.23 °C | 79 mm |
| June | 6.79 °C | 11.5 °C | 68 mm |
| July | 11.98 °C | 17.09 °C | 80 mm |
| August | 13.62 °C | 18.32 °C | 76 mm |
| September | 10.81 °C | 15.63 °C | 97 mm |
| October | 6.97 °C | 10.95 °C | 113 mm |
| November | 2.71 °C | 6.83 °C | 108 mm |
| December | -1.63 °C | 2.75 °C | 105 mm |
| Annual | 3.2 °C | 7.7 °C | 993 mm |
| Average First Frost Date | Oct. 11 - Oct. 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 |