Saint-Jérôme, Quebec climate data is summarized below. Average annual temperatures range from 1.3 °C (low) to 10.7 °C (high). Annual precipitation averages 719 Millimeters. Saint-Jérôme is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.36 °C | -5.85 °C | 0 mm |
| February | -13.81 °C | -5.05 °C | 0 mm |
| March | -7.46 °C | 1.55 °C | 21 mm |
| April | 0.13 °C | 9.97 °C | 59 mm |
| May | 7.56 °C | 18.61 °C | 73 mm |
| June | 12.76 °C | 23.09 °C | 109 mm |
| July | 15.2 °C | 25.49 °C | 146 mm |
| August | 14.48 °C | 24.65 °C | 106 mm |
| September | 9.8 °C | 20.19 °C | 71 mm |
| October | 4.08 °C | 12.69 °C | 85 mm |
| November | -2.21 °C | 5.35 °C | 38 mm |
| December | -10.13 °C | -2.9 °C | 11 mm |
| Annual | 1.3 °C | 10.7 °C | 719 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |