Rainbow Lake, Alberta climate data is summarized below. Average annual temperatures range from -3.9 °C (low) to 5.3 °C (high). Annual precipitation averages 227 Millimeters. Rainbow Lake is located in USDA Plant Hardiness Zone 1a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.84 °C | -11.32 °C | 0 mm |
| February | -17.18 °C | -8.76 °C | 0 mm |
| March | -14.05 °C | -5.57 °C | 0 mm |
| April | -3.26 °C | 4.83 °C | 12 mm |
| May | 2.93 °C | 15.28 °C | 28 mm |
| June | 7.82 °C | 20.86 °C | 42 mm |
| July | 10.7 °C | 22.8 °C | 58 mm |
| August | 8.67 °C | 20.65 °C | 34 mm |
| September | 4.91 °C | 14.14 °C | 37 mm |
| October | -0.32 °C | 5.88 °C | 16 mm |
| November | -10.37 °C | -4.83 °C | 0 mm |
| December | -17.4 °C | -10.29 °C | 0 mm |
| Annual | -3.9 °C | 5.3 °C | 227 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 1a : |
| Current Drought Conditions | Normal |