Rouleau, Saskatchewan climate data is summarized below. Average annual temperatures range from -2.6 °C (low) to 9.5 °C (high). Annual precipitation averages 396 Millimeters. Rouleau 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 | -17.34 °C | -7.6 °C | 0 mm |
| February | -17.86 °C | -7.31 °C | 0 mm |
| March | -9.94 °C | 0.3 °C | 0 mm |
| April | -2.54 °C | 10.05 °C | 36 mm |
| May | 3.69 °C | 17.95 °C | 68 mm |
| June | 9.77 °C | 22.49 °C | 101 mm |
| July | 12.24 °C | 25.88 °C | 67 mm |
| August | 10.53 °C | 25.13 °C | 49 mm |
| September | 5.68 °C | 20.75 °C | 43 mm |
| October | -0.51 °C | 11.73 °C | 32 mm |
| November | -8.57 °C | 1.83 °C | 0 mm |
| December | -16.59 °C | -7.84 °C | 0 mm |
| Annual | -2.6 °C | 9.5 °C | 396 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 |