Saint-Jean-Port-Joli, Quebec climate data is summarized below. Average annual temperatures range from 34.9 °F (low) to 48.1 °F (high). Annual precipitation averages 23.6 Inches. Saint-Jean-Port-Joli is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -25.3 °F | -20.9 °F | 0 in. |
| February | -25 °F | -20.6 °F | 0 in. |
| March | -22.5 °F | -18 °F | 0 in. |
| April | -17.8 °F | -13.8 °F | 965.2 in. |
| May | -14.3 °F | -9.6 °F | 1600.2 in. |
| June | -11.4 °F | -6.8 °F | 1955.8 in. |
| July | -9.6 °F | -5.2 °F | 2184.4 in. |
| August | -9.8 °F | -5.5 °F | 2438.4 in. |
| September | -12.1 °F | -7.8 °F | 2108.2 in. |
| October | -14.9 °F | -11.5 °F | 2387.6 in. |
| November | -17.9 °F | -14.9 °F | 1600.2 in. |
| December | -22.2 °F | -18.9 °F | 0 in. |
| Annual | 34.9 °F | 48.1 °F | 23.63 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |