Coaldale, Alberta climate data is summarized below. Average annual temperatures range from 0.3 °C (low) to 12.6 °C (high). Annual precipitation averages 375 Millimeters. Coaldale is located in USDA Plant Hardiness Zone 4b. 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 | -10.25 °C | -0.4 °C | 0 mm |
| February | -9.31 °C | 1.52 °C | 0 mm |
| March | -4.41 °C | 7.01 °C | 2 mm |
| April | -0.52 °C | 12.07 °C | 41 mm |
| May | 4.71 °C | 17.83 °C | 72 mm |
| June | 9.2 °C | 21.68 °C | 103 mm |
| July | 12.18 °C | 26.2 °C | 52 mm |
| August | 10.82 °C | 25.86 °C | 35 mm |
| September | 6.62 °C | 21.22 °C | 37 mm |
| October | 1.52 °C | 13.91 °C | 29 mm |
| November | -5.04 °C | 5.39 °C | 4 mm |
| December | -11.59 °C | -1.5 °C | 0 mm |
| Annual | 0.3 °C | 12.6 °C | 375 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |