Whitemouth, Manitoba climate data is summarized below. Average annual temperatures range from -2.3 °C (low) to 8.8 °C (high). Annual precipitation averages 559 Millimeters. 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 | -21.41 °C | -11.04 °C | 0 mm |
| February | -20.73 °C | -8.77 °C | 0 mm |
| March | -11.38 °C | 0.76 °C | 4 mm |
| April | -2.31 °C | 10.02 °C | 35 mm |
| May | 4.57 °C | 17.58 °C | 92 mm |
| June | 11.11 °C | 22.94 °C | 126 mm |
| July | 13.6 °C | 25.96 °C | 101 mm |
| August | 12.66 °C | 24.88 °C | 83 mm |
| September | 7.82 °C | 19.56 °C | 66 mm |
| October | 1.92 °C | 11.13 °C | 52 mm |
| November | -6.51 °C | 1.07 °C | 0 mm |
| December | -17.41 °C | -9.06 °C | 0 mm |
| Annual | -2.3 °C | 8.8 °C | 559 mm |
| 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°C to -37.2°C |
| Current Drought Conditions | Normal |