Rouleau, Saskatchewan climate data is summarized below. Average annual temperatures range from 27.3 °F (low) to 49 °F (high). Annual precipitation averages 15.6 Inches. 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 | -27.4 °F | -22 °F | 0 in. |
| February | -27.7 °F | -21.8 °F | 0 in. |
| March | -23.3 °F | -17.6 °F | 0 in. |
| April | -19.2 °F | -12.2 °F | 914.4 in. |
| May | -15.7 °F | -7.8 °F | 1727.2 in. |
| June | -12.4 °F | -5.3 °F | 2565.4 in. |
| July | -11 °F | -3.4 °F | 1701.8 in. |
| August | -11.9 °F | -3.8 °F | 1244.6 in. |
| September | -14.6 °F | -6.3 °F | 1092.2 in. |
| October | -18.1 °F | -11.3 °F | 812.8 in. |
| November | -22.5 °F | -16.8 °F | 0 in. |
| December | -27 °F | -22.1 °F | 0 in. |
| Annual | 27.3 °F | 49 °F | 15.6 in. |
| 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 : -35°F to -30°F |
| Current Drought Conditions | Normal |