Saint-Leonard, New Brunswick climate data is summarized below. Average annual temperatures range from 29.4 °F (low) to 47.9 °F (high). Annual precipitation averages 32.4 Inches. Saint-Leonard is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -27.2 °F | -21.7 °F | 0 in. |
| February | -26.5 °F | -20.9 °F | 0 in. |
| March | -24.3 °F | -18.1 °F | 279.4 in. |
| April | -19.5 °F | -13.9 °F | 1447.8 in. |
| May | -15.6 °F | -9.1 °F | 2286 in. |
| June | -12.7 °F | -6.4 °F | 3073.4 in. |
| July | -10.8 °F | -4.6 °F | 4064 in. |
| August | -11.2 °F | -4.9 °F | 2844.8 in. |
| September | -14 °F | -7.7 °F | 2209.8 in. |
| October | -16.8 °F | -11.8 °F | 2336.8 in. |
| November | -19.9 °F | -15.7 °F | 1955.8 in. |
| December | -24.4 °F | -19.8 °F | 406.4 in. |
| Annual | 29.4 °F | 47.9 °F | 32.39 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |