St. Brieux, Saskatchewan climate data is summarized below. Average annual temperatures range from -3.4 °C (low) to 7 °C (high). Annual precipitation averages 489 Millimeters. St. Brieux is located in USDA Plant Hardiness Zone 3a. 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 | -19.56 °C | -10.54 °C | 0 mm |
| February | -20.25 °C | -10.13 °C | 0 mm |
| March | -12.38 °C | -2.77 °C | 0 mm |
| April | -3.62 °C | 6.76 °C | 31 mm |
| May | 3.56 °C | 17.06 °C | 44 mm |
| June | 9.59 °C | 21.41 °C | 135 mm |
| July | 12.27 °C | 23.81 °C | 116 mm |
| August | 10.73 °C | 23.49 °C | 69 mm |
| September | 5.95 °C | 18.48 °C | 51 mm |
| October | 0.26 °C | 8.82 °C | 43 mm |
| November | -9.05 °C | -2.21 °C | 0 mm |
| December | -18 °C | -10.88 °C | 0 mm |
| Annual | -3.4 °C | 7 °C | 489 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 3a : -40°C to -37.2°C |
| Current Drought Conditions | Normal |