Napierville, Quebec climate data is summarized below. Average annual temperatures range from 36.7 °F (low) to 53.7 °F (high). Annual precipitation averages 20.1 Inches. Napierville is located in USDA Plant Hardiness Zone 5b. 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 | -24.6 °F | -19.9 °F | 177.8 in. |
| February | -24.5 °F | -19.7 °F | 228.6 in. |
| March | -21.2 °F | -16 °F | 711.2 in. |
| April | -16.9 °F | -11.1 °F | 1447.8 in. |
| May | -13.1 °F | -6.9 °F | 1422.4 in. |
| June | -10.3 °F | -4.5 °F | 1727.2 in. |
| July | -8.9 °F | -3 °F | 2108.2 in. |
| August | -9.4 °F | -3.5 °F | 1244.6 in. |
| September | -12 °F | -6 °F | 965.2 in. |
| October | -15 °F | -10.2 °F | 1524 in. |
| November | -18.2 °F | -14 °F | 939.8 in. |
| December | -22 °F | -18.3 °F | 457.2 in. |
| Annual | 36.7 °F | 53.7 °F | 20.08 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |