Thorsby, Alberta climate data is summarized below. Average annual temperatures range from 28.6 °F (low) to 47.7 °F (high). Annual precipitation averages 18.3 Inches. Thorsby 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. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -25.2 °F | -20.9 °F | 0 in. |
| February | -24.9 °F | -19.9 °F | 0 in. |
| March | -22.5 °F | -17.2 °F | 0 in. |
| April | -19.1 °F | -12.9 °F | 863.6 in. |
| May | -15.8 °F | -8.5 °F | 2006.6 in. |
| June | -13.2 °F | -6.5 °F | 2565.4 in. |
| July | -11.7 °F | -4.9 °F | 2895.6 in. |
| August | -12.6 °F | -5.3 °F | 1651 in. |
| September | -15 °F | -7.5 °F | 1066.8 in. |
| October | -17.8 °F | -11.9 °F | 762 in. |
| November | -21.9 °F | -18 °F | 0 in. |
| December | -26.1 °F | -21.8 °F | 0 in. |
| Annual | 28.6 °F | 47.7 °F | 18.31 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Abnormally Dry |