Hartney, Manitoba climate data is summarized below. Average annual temperatures range from -2.2 °C (low) to 9 °C (high). Annual precipitation averages 622 Millimeters. Hartney 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 | -19.34 °C | -9.45 °C | 0 mm |
| February | -19.06 °C | -8.68 °C | 0 mm |
| March | -10.18 °C | 0.39 °C | 7 mm |
| April | -1.83 °C | 9.88 °C | 47 mm |
| May | 4.63 °C | 17.47 °C | 92 mm |
| June | 10.85 °C | 22.58 °C | 149 mm |
| July | 13.35 °C | 25.49 °C | 131 mm |
| August | 11.85 °C | 25.34 °C | 95 mm |
| September | 7.2 °C | 20.48 °C | 59 mm |
| October | 0.78 °C | 11.89 °C | 38 mm |
| November | -7.63 °C | 1.49 °C | 4 mm |
| December | -17.41 °C | -8.88 °C | 0 mm |
| Annual | -2.2 °C | 9 °C | 622 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 | Abnormally Dry |