Saint-Jean-sur-Richelieu, Quebec climate data is summarized below. Average annual temperatures range from 37.2 °F (low) to 53.9 °F (high). Annual precipitation averages 22.9 Inches. Saint-Jean-sur-Richelieu is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -24.5 °F | -19.9 °F | 355.6 in. |
| February | -24.3 °F | -19.7 °F | 304.8 in. |
| March | -21 °F | -15.9 °F | 939.8 in. |
| April | -16.7 °F | -11.1 °F | 1803.4 in. |
| May | -13 °F | -6.8 °F | 1574.8 in. |
| June | -10.1 °F | -4.4 °F | 1752.6 in. |
| July | -8.7 °F | -2.9 °F | 2159 in. |
| August | -9.2 °F | -3.5 °F | 1346.2 in. |
| September | -11.8 °F | -6 °F | 1041.4 in. |
| October | -14.9 °F | -10.1 °F | 1676.4 in. |
| November | -18 °F | -14 °F | 1117.6 in. |
| December | -21.9 °F | -18.2 °F | 685.8 in. |
| Annual | 37.2 °F | 53.9 °F | 22.88 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |