Swan Lake, Manitoba climate data is summarized below. Average annual temperatures range from 27.7 °F (low) to 46.5 °F (high). Annual precipitation averages 18.7 Inches. 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 | -28.9 °F | -23.6 °F | 0 in. |
| February | -28.5 °F | -23 °F | 0 in. |
| March | -23.5 °F | -18.1 °F | 203.2 in. |
| April | -19 °F | -13.1 °F | 508 in. |
| May | -15.3 °F | -8.7 °F | 1498.6 in. |
| June | -11.8 °F | -5.7 °F | 3302 in. |
| July | -10.5 °F | -4.3 °F | 2590.8 in. |
| August | -11.2 °F | -4.3 °F | 2489.2 in. |
| September | -13.8 °F | -6.8 °F | 1041.4 in. |
| October | -17.3 °F | -11.7 °F | 457.2 in. |
| November | -22.1 °F | -17.4 °F | 0 in. |
| December | -27.6 °F | -23 °F | 0 in. |
| Annual | 27.7 °F | 46.5 °F | 18.74 in. |
| 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 : -35°F to -30°F |
| Current Drought Conditions | Normal |