Devon, Alberta climate data is summarized below. Average annual temperatures range from -2.1 °C (low) to 8.8 °C (high). Annual precipitation averages 440 Millimeters. Devon is located in USDA Plant Hardiness Zone 3b. 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 | -14.36 °C | -5.88 °C | 0 mm |
| February | -13.63 °C | -4.33 °C | 0 mm |
| March | -9.19 °C | 0.7 °C | 0 mm |
| April | -2.28 °C | 8.87 °C | 34 mm |
| May | 3.68 °C | 17.23 °C | 72 mm |
| June | 8.55 °C | 20.92 °C | 88 mm |
| July | 11.2 °C | 23.68 °C | 112 mm |
| August | 9.57 °C | 22.98 °C | 64 mm |
| September | 4.97 °C | 18.92 °C | 39 mm |
| October | -0.1 °C | 10.69 °C | 31 mm |
| November | -7.71 °C | -0.59 °C | 0 mm |
| December | -15.63 °C | -7.61 °C | 0 mm |
| Annual | -2.1 °C | 8.8 °C | 440 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |