Cardston, Alberta climate data is summarized below. Average annual temperatures range from 32.1 °F (low) to 52 °F (high). Annual precipitation averages 11.9 Inches. 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 | -23 °F | -18 °F | 0 in. |
| February | -22.3 °F | -17.3 °F | 0 in. |
| March | -20.1 °F | -14.9 °F | 0 in. |
| April | -18.5 °F | -12.4 °F | 482.6 in. |
| May | -15.9 °F | -9.4 °F | 1346.2 in. |
| June | -13.6 °F | -7 °F | 2540 in. |
| July | -11.7 °F | -4 °F | 1092.2 in. |
| August | -12.4 °F | -4.3 °F | 863.6 in. |
| September | -14.5 °F | -7 °F | 914.4 in. |
| October | -17.2 °F | -10.9 °F | 457.2 in. |
| November | -20.4 °F | -15.3 °F | 0 in. |
| December | -23.6 °F | -18.7 °F | 0 in. |
| Annual | 32.1 °F | 52 °F | 11.94 in. |
| 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 : -30°F to -25°F |
| Current Drought Conditions | Severe Drought |