Calgary, Alberta climate data is summarized below. Average annual temperatures range from 30.9 °F (low) to 51.7 °F (high). Annual precipitation averages 15.8 Inches. Calgary is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.9 °F | -18.2 °F | 0 in. |
| February | -23.5 °F | -17.8 °F | 0 in. |
| March | -21.1 °F | -15.1 °F | 0 in. |
| April | -18.6 °F | -12 °F | 685.8 in. |
| May | -15.5 °F | -8.6 °F | 2032 in. |
| June | -13.1 °F | -6.5 °F | 2692.4 in. |
| July | -11.3 °F | -4.4 °F | 1701.8 in. |
| August | -12.1 °F | -4.8 °F | 1168.4 in. |
| September | -14.7 °F | -7 °F | 1066.8 in. |
| October | -17.5 °F | -11 °F | 838.2 in. |
| November | -21.3 °F | -15.8 °F | 0 in. |
| December | -24.7 °F | -19.3 °F | 0 in. |
| Annual | 30.9 °F | 51.7 °F | 15.78 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |