Whitemouth, Manitoba climate data is summarized below. Average annual temperatures range from 27.8 °F (low) to 47.7 °F (high). Annual precipitation averages 22 Inches. Whitemouth is located in USDA Plant Hardiness Zone 3a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -29.7 °F | -23.9 °F | 0 in. |
| February | -29.3 °F | -22.7 °F | 0 in. |
| March | -24.1 °F | -17.4 °F | 101.6 in. |
| April | -19.1 °F | -12.2 °F | 889 in. |
| May | -15.2 °F | -8 °F | 2336.8 in. |
| June | -11.6 °F | -5 °F | 3200.4 in. |
| July | -10.2 °F | -3.4 °F | 2565.4 in. |
| August | -10.7 °F | -4 °F | 2108.2 in. |
| September | -13.4 °F | -6.9 °F | 1676.4 in. |
| October | -16.7 °F | -11.6 °F | 1320.8 in. |
| November | -21.4 °F | -17.2 °F | 0 in. |
| December | -27.5 °F | -22.8 °F | 0 in. |
| Annual | 27.8 °F | 47.7 °F | 22.02 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3a : -40°F to -35°F |
| Current Drought Conditions | Normal |