Magrath, Alberta climate data is summarized below. Annual precipitation averages 342 Millimeters. 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 | -9.48 °C | -0.14 °C | 0 mm |
| February | -8.71 °C | 1.65 °C | 0 mm |
| March | -4.45 °C | 6.76 °C | 2 mm |
| April | -0.97 °C | 11.41 °C | 35 mm |
| May | 3.83 °C | 16.89 °C | 63 mm |
| June | 8.09 °C | 21.06 °C | 102 mm |
| July | 11.07 °C | 26.04 °C | 47 mm |
| August | 9.7 °C | 25.66 °C | 34 mm |
| September | 5.96 °C | 20.92 °C | 36 mm |
| October | 1.02 °C | 13.66 °C | 23 mm |
| November | -4.96 °C | 5.54 °C | 0 mm |
| December | -10.87 °C | -1.06 °C | 0 mm |
| Annual | 0 °C | 12.4 °C | 342 mm |
| 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 : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |