Swan Lake, Manitoba climate data is summarized below. Average annual temperatures range from -2.4 °C (low) to 8 °C (high). Annual precipitation averages 476 Millimeters. Swan Lake is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -19.95 °C | -10.5 °C | 0 mm |
| February | -19.25 °C | -9.45 °C | 0 mm |
| March | -10.37 °C | -0.53 °C | 8 mm |
| April | -2.13 °C | 8.44 °C | 20 mm |
| May | 4.54 °C | 16.34 °C | 59 mm |
| June | 10.79 °C | 21.74 °C | 130 mm |
| July | 13.07 °C | 24.31 °C | 102 mm |
| August | 11.82 °C | 24.32 °C | 98 mm |
| September | 7.12 °C | 19.73 °C | 41 mm |
| October | 0.8 °C | 10.95 °C | 18 mm |
| November | -7.72 °C | 0.68 °C | 0 mm |
| December | -17.59 °C | -9.48 °C | 0 mm |
| Annual | -2.4 °C | 8 °C | 476 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |