Saint-Jérôme, Quebec climate data is summarized below. Average annual temperatures range from 34.4 °F (low) to 51.2 °F (high). Annual precipitation averages 28.3 Inches. 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 | -25.8 °F | -21 °F | 0 in. |
| February | -25.5 °F | -20.6 °F | 0 in. |
| March | -21.9 °F | -16.9 °F | 533.4 in. |
| April | -17.7 °F | -12.2 °F | 1498.6 in. |
| May | -13.6 °F | -7.4 °F | 1854.2 in. |
| June | -10.7 °F | -5 °F | 2768.6 in. |
| July | -9.3 °F | -3.6 °F | 3708.4 in. |
| August | -9.7 °F | -4.1 °F | 2692.4 in. |
| September | -12.3 °F | -6.6 °F | 1803.4 in. |
| October | -15.5 °F | -10.7 °F | 2159 in. |
| November | -19 °F | -14.8 °F | 965.2 in. |
| December | -23.4 °F | -19.4 °F | 279.4 in. |
| Annual | 34.4 °F | 51.2 °F | 28.31 in. |
| 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 : -20°F to -15°F |
| Current Drought Conditions | Normal |