Cardston, Alberta climate data is summarized below. Annual precipitation averages 303 Millimeters. Cardston is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.35 °C | -0.47 °C | 0 mm |
| February | -8.17 °C | 0.92 °C | 0 mm |
| March | -4.22 °C | 5.14 °C | 0 mm |
| April | -1.22 °C | 9.65 °C | 19 mm |
| May | 3.46 °C | 15.14 °C | 53 mm |
| June | 7.55 °C | 19.41 °C | 100 mm |
| July | 10.91 °C | 24.75 °C | 43 mm |
| August | 9.71 °C | 24.26 °C | 34 mm |
| September | 5.93 °C | 19.41 °C | 36 mm |
| October | 1.05 °C | 12.36 °C | 18 mm |
| November | -4.79 °C | 4.5 °C | 0 mm |
| December | -10.56 °C | -1.58 °C | 0 mm |
| Annual | 0 °C | 11.1 °C | 303 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Severe Drought |