Oakville, Manitoba climate data is summarized below. Average annual temperatures range from -1.8 °C (low) to 8.5 °C (high). Annual precipitation averages 475 Millimeters. Oakville is located in USDA Plant Hardiness Zone 4a. 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 | -20.13 °C | -10.84 °C | 0 mm |
| February | -19.59 °C | -9.61 °C | 0 mm |
| March | -10.42 °C | -0.58 °C | 1 mm |
| April | -1.75 °C | 9.39 °C | 26 mm |
| May | 5.11 °C | 17.21 °C | 90 mm |
| June | 11.66 °C | 22.81 °C | 108 mm |
| July | 14.09 °C | 25.48 °C | 90 mm |
| August | 12.99 °C | 25.14 °C | 71 mm |
| September | 8.11 °C | 20.17 °C | 42 mm |
| October | 1.81 °C | 11.44 °C | 47 mm |
| November | -6.66 °C | 1.09 °C | 0 mm |
| December | -17.13 °C | -9.55 °C | 0 mm |
| Annual | -1.8 °C | 8.5 °C | 475 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 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |