Killarney, Manitoba climate data is summarized below. Average annual temperatures range from 28.5 °F (low) to 47.5 °F (high). Annual precipitation averages 23.7 Inches. Killarney 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -28.1 °F | -22.9 °F | 0 in. |
| February | -27.8 °F | -22.5 °F | 0 in. |
| March | -23.1 °F | -17.6 °F | 254 in. |
| April | -18.8 °F | -12.7 °F | 1066.8 in. |
| May | -15.2 °F | -8.6 °F | 2514.6 in. |
| June | -11.8 °F | -5.6 °F | 3987.8 in. |
| July | -10.4 °F | -4 °F | 2590.8 in. |
| August | -11.2 °F | -4.1 °F | 2616.2 in. |
| September | -13.7 °F | -6.7 °F | 1320.8 in. |
| October | -17.2 °F | -11.5 °F | 914.4 in. |
| November | -21.8 °F | -17 °F | 25.4 in. |
| December | -27.2 °F | -22.7 °F | 0 in. |
| Annual | 28.5 °F | 47.5 °F | 23.71 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 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |