Saint-Henri, Quebec climate data is summarized below. Average annual temperatures range from 1.1 °C (low) to 10.4 °C (high). Annual precipitation averages 860 Millimeters. Saint-Henri 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 | -14.17 °C | -5.67 °C | 0 mm |
| February | -13.46 °C | -4.76 °C | 0 mm |
| March | -8.45 °C | 0.85 °C | 13 mm |
| April | -0.19 °C | 9.86 °C | 68 mm |
| May | 6.38 °C | 17.77 °C | 94 mm |
| June | 11.71 °C | 22.54 °C | 116 mm |
| July | 14.96 °C | 25.36 °C | 148 mm |
| August | 14.12 °C | 24.28 °C | 127 mm |
| September | 9.37 °C | 19.55 °C | 103 mm |
| October | 3.84 °C | 11.97 °C | 110 mm |
| November | -1.83 °C | 5.17 °C | 72 mm |
| December | -9.56 °C | -2.87 °C | 9 mm |
| Annual | 1.1 °C | 10.4 °C | 860 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 |