Swan River, Manitoba climate data is summarized below. Average annual temperatures range from -3.8 °C (low) to 7.3 °C (high). Annual precipitation averages 520 Millimeters. Swan River 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 | -21.48 °C | -11.86 °C | 0 mm |
| February | -21.58 °C | -10.54 °C | 0 mm |
| March | -13.52 °C | -2.16 °C | 0 mm |
| April | -3.42 °C | 8.36 °C | 20 mm |
| May | 3.7 °C | 16.71 °C | 56 mm |
| June | 9.93 °C | 21.77 °C | 144 mm |
| July | 12.5 °C | 24.34 °C | 123 mm |
| August | 11.09 °C | 23.81 °C | 81 mm |
| September | 5.79 °C | 19.2 °C | 48 mm |
| October | 0.29 °C | 10.09 °C | 48 mm |
| November | -9 °C | -1.06 °C | 0 mm |
| December | -19.51 °C | -11.3 °C | 0 mm |
| Annual | -3.8 °C | 7.3 °C | 520 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 |