McCreary, Manitoba climate data is summarized below. Average annual temperatures range from -2 °C (low) to 8.6 °C (high). Annual precipitation averages 501 Millimeters. McCreary 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 | -18.77 °C | -9.68 °C | 0 mm |
| February | -18.75 °C | -8.63 °C | 0 mm |
| March | -10.39 °C | -0.14 °C | 0 mm |
| April | -2.15 °C | 8.97 °C | 23 mm |
| May | 4.41 °C | 16.58 °C | 83 mm |
| June | 10.96 °C | 22.21 °C | 123 mm |
| July | 13.64 °C | 25.34 °C | 85 mm |
| August | 12.35 °C | 24.8 °C | 84 mm |
| September | 7.43 °C | 19.91 °C | 52 mm |
| October | 1.28 °C | 11.3 °C | 51 mm |
| November | -6.82 °C | 1.16 °C | 0 mm |
| December | -17.16 °C | -9.1 °C | 0 mm |
| Annual | -2 °C | 8.6 °C | 501 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 | Normal |