St. George, New Brunswick climate data is summarized below. Average annual temperatures range from 2 °C (low) to 11.1 °C (high). Annual precipitation averages 942 Millimeters. St. George is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.54 °C | -1.6 °C | 33 mm |
| February | -10.04 °C | -0.9 °C | 34 mm |
| March | -5.96 °C | 3.46 °C | 71 mm |
| April | 0.46 °C | 9.75 °C | 92 mm |
| May | 5.54 °C | 15.02 °C | 101 mm |
| June | 10.07 °C | 19.64 °C | 85 mm |
| July | 13.23 °C | 22.81 °C | 70 mm |
| August | 13.21 °C | 22.85 °C | 70 mm |
| September | 9.37 °C | 19.41 °C | 73 mm |
| October | 4.64 °C | 13.8 °C | 110 mm |
| November | -0.23 °C | 7.72 °C | 105 mm |
| December | -6.39 °C | 1.68 °C | 98 mm |
| Annual | 2 °C | 11.1 °C | 942 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |