McCreary, Manitoba climate data is summarized below. Average annual temperatures range from 28.4 °F (low) to 47.4 °F (high). Annual precipitation averages 19.7 Inches. 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 | -28.2 °F | -23.2 °F | 0 in. |
| February | -28.2 °F | -22.6 °F | 0 in. |
| March | -23.6 °F | -17.9 °F | 0 in. |
| April | -19 °F | -12.8 °F | 584.2 in. |
| May | -15.3 °F | -8.6 °F | 2108.2 in. |
| June | -11.7 °F | -5.4 °F | 3124.2 in. |
| July | -10.2 °F | -3.7 °F | 2159 in. |
| August | -10.9 °F | -4 °F | 2133.6 in. |
| September | -13.7 °F | -6.7 °F | 1320.8 in. |
| October | -17.1 °F | -11.5 °F | 1295.4 in. |
| November | -21.6 °F | -17.1 °F | 0 in. |
| December | -27.3 °F | -22.8 °F | 0 in. |
| Annual | 28.4 °F | 47.4 °F | 19.74 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 |