Stettler, Alberta climate data is summarized below. Average annual temperatures range from -2.2 °C (low) to 8.8 °C (high). Annual precipitation averages 439 Millimeters. Stettler 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 | -15.34 °C | -6.71 °C | 0 mm |
| February | -14.96 °C | -5.41 °C | 0 mm |
| March | -8.62 °C | 1.24 °C | 0 mm |
| April | -2.34 °C | 9.07 °C | 36 mm |
| May | 4.09 °C | 17.17 °C | 61 mm |
| June | 8.93 °C | 20.84 °C | 106 mm |
| July | 11.54 °C | 24.02 °C | 98 mm |
| August | 9.89 °C | 23.34 °C | 62 mm |
| September | 5.2 °C | 19.05 °C | 48 mm |
| October | -0.25 °C | 10.77 °C | 28 mm |
| November | -8.45 °C | -0.34 °C | 0 mm |
| December | -16.16 °C | -7.99 °C | 0 mm |
| Annual | -2.2 °C | 8.8 °C | 439 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 | Abnormally Dry |