Red Deer, Alberta climate data is summarized below. Average annual temperatures range from -3.2 °C (low) to 8.5 °C (high). Annual precipitation averages 501 Millimeters. Red Deer is located in USDA Plant Hardiness Zone 4a. 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 | -15.16 °C | -5.95 °C | 0 mm |
| February | -15.05 °C | -4.25 °C | 0 mm |
| March | -9.75 °C | 0.66 °C | 0 mm |
| April | -3.5 °C | 8.26 °C | 39 mm |
| May | 2.65 °C | 16.41 °C | 84 mm |
| June | 7.42 °C | 19.8 °C | 124 mm |
| July | 9.93 °C | 23 °C | 104 mm |
| August | 8.36 °C | 22.3 °C | 70 mm |
| September | 3.75 °C | 18.38 °C | 51 mm |
| October | -1.5 °C | 10.5 °C | 29 mm |
| November | -9.04 °C | -0.16 °C | 0 mm |
| December | -16.37 °C | -7.37 °C | 0 mm |
| Annual | -3.2 °C | 8.5 °C | 501 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |