Magrath, Alberta climate data is summarized below. Average annual temperatures range from 32 °F (low) to 54.3 °F (high). Annual precipitation averages 13.5 Inches. Magrath is located in USDA Plant Hardiness Zone 4b. 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 °F | -17.9 °F | 0 in. |
| February | -22.6 °F | -16.9 °F | 0 in. |
| March | -20.3 °F | -14 °F | 50.8 in. |
| April | -18.3 °F | -11.4 °F | 889 in. |
| May | -15.7 °F | -8.4 °F | 1600.2 in. |
| June | -13.3 °F | -6.1 °F | 2590.8 in. |
| July | -11.6 °F | -3.3 °F | 1193.8 in. |
| August | -12.4 °F | -3.5 °F | 863.6 in. |
| September | -14.5 °F | -6.2 °F | 914.4 in. |
| October | -17.2 °F | -10.2 °F | 584.2 in. |
| November | -20.5 °F | -14.7 °F | 0 in. |
| December | -23.8 °F | -18.4 °F | 0 in. |
| Annual | 32 °F | 54.3 °F | 13.48 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |