Willowbrook, Saskatchewan climate data is summarized below. Average annual temperatures range from -2.7 °C (low) to 7.5 °C (high). Annual precipitation averages 470 Millimeters. Willowbrook 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 | -18.84 °C | -10.1 °C | 0 mm |
| February | -18.96 °C | -9.5 °C | 0 mm |
| March | -11.46 °C | -1.65 °C | 0 mm |
| April | -2.69 °C | 8.14 °C | 27 mm |
| May | 4.25 °C | 16.64 °C | 61 mm |
| June | 10.22 °C | 21.17 °C | 123 mm |
| July | 13 °C | 24.09 °C | 98 mm |
| August | 11.57 °C | 23.44 °C | 75 mm |
| September | 6.63 °C | 18.94 °C | 50 mm |
| October | 0.67 °C | 10.18 °C | 36 mm |
| November | -8.38 °C | -0.57 °C | 0 mm |
| December | -17.77 °C | -10.17 °C | 0 mm |
| Annual | -2.7 °C | 7.5 °C | 470 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 | Normal |