Saint-Jean-Port-Joli, Quebec climate data is summarized below. Average annual temperatures range from 1.6 °C (low) to 9 °C (high). Annual precipitation averages 600 Millimeters. 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 | -13.49 °C | -5.62 °C | 0 mm |
| February | -13.06 °C | -5.03 °C | 0 mm |
| March | -8.55 °C | -0.34 °C | 0 mm |
| April | -0.07 °C | 7.12 °C | 38 mm |
| May | 6.35 °C | 14.8 °C | 63 mm |
| June | 11.47 °C | 19.68 °C | 77 mm |
| July | 14.75 °C | 22.56 °C | 86 mm |
| August | 14.44 °C | 22.13 °C | 96 mm |
| September | 10.29 °C | 17.91 °C | 83 mm |
| October | 5.19 °C | 11.28 °C | 94 mm |
| November | -0.17 °C | 5.13 °C | 63 mm |
| December | -8.04 °C | -2.04 °C | 0 mm |
| Annual | 1.6 °C | 9 °C | 600 mm |
| 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 : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |