St. George, New Brunswick climate data is summarized below. Average annual temperatures range from 35.5 °F (low) to 52 °F (high). Annual precipitation averages 37.1 Inches. 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 | -23.6 °F | -18.7 °F | 838.2 in. |
| February | -23.4 °F | -18.3 °F | 863.6 in. |
| March | -21.1 °F | -15.9 °F | 1803.4 in. |
| April | -17.5 °F | -12.4 °F | 2336.8 in. |
| May | -14.7 °F | -9.4 °F | 2565.4 in. |
| June | -12.2 °F | -6.9 °F | 2159 in. |
| July | -10.4 °F | -5.1 °F | 1778 in. |
| August | -10.4 °F | -5.1 °F | 1778 in. |
| September | -12.6 °F | -7 °F | 1854.2 in. |
| October | -15.2 °F | -10.1 °F | 2794 in. |
| November | -17.9 °F | -13.5 °F | 2667 in. |
| December | -21.3 °F | -16.8 °F | 2489.2 in. |
| Annual | 35.5 °F | 52 °F | 37.1 in. |
| 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 : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |