Osler, Saskatchewan climate data is summarized below. Average annual temperatures range from -3.2 °C (low) to 8.1 °C (high). Annual precipitation averages 425 Millimeters. Osler 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 | -19.25 °C | -9.28 °C | 0 mm |
| February | -19.7 °C | -9 °C | 0 mm |
| March | -11.64 °C | -1.04 °C | 0 mm |
| April | -2.51 °C | 9.29 °C | 24 mm |
| May | 4.05 °C | 18.07 °C | 58 mm |
| June | 9.71 °C | 21.86 °C | 118 mm |
| July | 12.51 °C | 24.74 °C | 93 mm |
| August | 10.9 °C | 23.79 °C | 51 mm |
| September | 5.69 °C | 19.35 °C | 44 mm |
| October | -0.74 °C | 10.36 °C | 37 mm |
| November | -9.05 °C | -0.59 °C | 0 mm |
| December | -17.97 °C | -9.96 °C | 0 mm |
| Annual | -3.2 °C | 8.1 °C | 425 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 |