Killam, Alberta climate data is summarized below. Average annual temperatures range from -2.1 °C (low) to 8.8 °C (high). Annual precipitation averages 391 Millimeters. Killam 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 | -16.13 °C | -7.27 °C | 0 mm |
| February | -15.3 °C | -6 °C | 0 mm |
| March | -9.16 °C | 0.55 °C | 0 mm |
| April | -2.09 °C | 9.32 °C | 32 mm |
| May | 4.5 °C | 17.99 °C | 52 mm |
| June | 9.64 °C | 21.75 °C | 96 mm |
| July | 12.32 °C | 24.8 °C | 86 mm |
| August | 10.54 °C | 23.91 °C | 61 mm |
| September | 5.72 °C | 19.65 °C | 37 mm |
| October | 0.1 °C | 10.93 °C | 27 mm |
| November | -8.38 °C | -0.95 °C | 0 mm |
| December | -17.05 °C | -8.88 °C | 0 mm |
| Annual | -2.1 °C | 8.8 °C | 391 mm |
| 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 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |