St. George's, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 0.9 °C (low) to 7.1 °C (high). Annual precipitation averages 917 Millimeters. St. George's is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.31 °C | -3.42 °C | 34 mm |
| February | -10.18 °C | -3.94 °C | 28 mm |
| March | -8.39 °C | -2.17 °C | 42 mm |
| April | -2.99 °C | 2.77 °C | 59 mm |
| May | 2.25 °C | 9.2 °C | 76 mm |
| June | 7.06 °C | 14.63 °C | 64 mm |
| July | 11.66 °C | 19.41 °C | 87 mm |
| August | 12.39 °C | 19.77 °C | 111 mm |
| September | 8.92 °C | 15.41 °C | 119 mm |
| October | 4.42 °C | 9.59 °C | 110 mm |
| November | -0.1 °C | 4.54 °C | 114 mm |
| December | -5.23 °C | -0.36 °C | 73 mm |
| Annual | 0.9 °C | 7.1 °C | 917 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |