Placentia, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.9 °C (low) to 8.4 °C (high). Annual precipitation averages 1111 Millimeters. Placentia is located in USDA Plant Hardiness Zone 6a. 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 | -5.62 °C | 0.02 °C | 76 mm |
| February | -6.53 °C | -1.12 °C | 76 mm |
| March | -4.8 °C | 0.03 °C | 72 mm |
| April | -1.07 °C | 4.17 °C | 85 mm |
| May | 2.99 °C | 9 °C | 86 mm |
| June | 7.05 °C | 13.29 °C | 76 mm |
| July | 12.03 °C | 18.14 °C | 85 mm |
| August | 13.55 °C | 19.39 °C | 86 mm |
| September | 10.5 °C | 16.36 °C | 109 mm |
| October | 6.46 °C | 11.3 °C | 127 mm |
| November | 2.21 °C | 6.95 °C | 123 mm |
| December | -2.21 °C | 2.73 °C | 110 mm |
| Annual | 2.9 °C | 8.4 °C | 1111 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |