Hanna, Alberta climate data is summarized below. Average annual temperatures range from 28.3 °F (low) to 49.2 °F (high). Annual precipitation averages 16.1 Inches. Hanna 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 | -25.9 °F | -20.6 °F | 0 in. |
| February | -25.7 °F | -20 °F | 0 in. |
| March | -22.2 °F | -16.4 °F | 0 in. |
| April | -18.9 °F | -12.2 °F | 812.8 in. |
| May | -15.7 °F | -8.3 °F | 1498.6 in. |
| June | -13 °F | -6.2 °F | 2819.4 in. |
| July | -11.5 °F | -4.1 °F | 1930.4 in. |
| August | -12.1 °F | -4.6 °F | 1727.2 in. |
| September | -15 °F | -7.1 °F | 1016 in. |
| October | -18.2 °F | -11.4 °F | 609.6 in. |
| November | -22.4 °F | -17 °F | 0 in. |
| December | -26.7 °F | -21.5 °F | 0 in. |
| Annual | 28.3 °F | 49.2 °F | 16.13 in. |
| 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°F to -35°F |
| Current Drought Conditions | Normal |