Whapmagoostui, Quebec climate data is summarized below. Average annual temperatures range from 19.2 °F (low) to 31.9 °F (high). Annual precipitation averages 20.4 Inches. Whapmagoostui is located in USDA Plant Hardiness Zone 0b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -31.6 °F | -27.5 °F | 0 in. |
| February | -33.1 °F | -27.6 °F | 0 in. |
| March | -30.5 °F | -24.4 °F | 0 in. |
| April | -24.5 °F | -19.5 °F | 0 in. |
| May | -19.6 °F | -15.9 °F | 889 in. |
| June | -16 °F | -11.2 °F | 1524 in. |
| July | -13.7 °F | -9.6 °F | 2946.4 in. |
| August | -12.8 °F | -9.3 °F | 2794 in. |
| September | -14.7 °F | -11.7 °F | 2794 in. |
| October | -16.9 °F | -14.7 °F | 1930.4 in. |
| November | -20.6 °F | -18.5 °F | 254 in. |
| December | -26.9 °F | -23.7 °F | 0 in. |
| Annual | 19.2 °F | 31.9 °F | 20.35 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | |
| Current Drought Conditions | Normal |