Saint-Romuald, Quebec climate data is summarized below. Average annual temperatures range from 1.1 °C (low) to 10.3 °C (high). Annual precipitation averages 902 Millimeters. Saint-Romuald 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.51 °C | -5.82 °C | 0 mm |
| February | -13.84 °C | -4.8 °C | 0 mm |
| March | -8.73 °C | 0.88 °C | 16 mm |
| April | -0.2 °C | 9.69 °C | 69 mm |
| May | 6.7 °C | 17.9 °C | 93 mm |
| June | 11.98 °C | 22.65 °C | 125 mm |
| July | 15.21 °C | 25.44 °C | 155 mm |
| August | 14.43 °C | 24.4 °C | 132 mm |
| September | 9.59 °C | 19.55 °C | 108 mm |
| October | 4.1 °C | 11.93 °C | 114 mm |
| November | -1.67 °C | 5.13 °C | 74 mm |
| December | -9.68 °C | -3 °C | 16 mm |
| Annual | 1.1 °C | 10.3 °C | 902 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |