Killarney, Manitoba climate data is summarized below. Average annual temperatures range from -1.9 °C (low) to 8.6 °C (high). Annual precipitation averages 602 Millimeters. 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 | -18.62 °C | -9.25 °C | 0 mm |
| February | -18.05 °C | -8.48 °C | 0 mm |
| March | -9.59 °C | 0.33 °C | 10 mm |
| April | -1.8 °C | 9.17 °C | 42 mm |
| May | 4.56 °C | 16.61 °C | 99 mm |
| June | 10.77 °C | 21.87 °C | 157 mm |
| July | 13.27 °C | 24.84 °C | 102 mm |
| August | 11.93 °C | 24.65 °C | 103 mm |
| September | 7.37 °C | 19.91 °C | 52 mm |
| October | 1.09 °C | 11.34 °C | 36 mm |
| November | -7.24 °C | 1.32 °C | 1 mm |
| December | -16.93 °C | -8.88 °C | 0 mm |
| Annual | -1.9 °C | 8.6 °C | 602 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 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |