Rainbow Lake, Alberta climate data is summarized below. Average annual temperatures range from 25 °F (low) to 41.6 °F (high). Annual precipitation averages 8.9 Inches. 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 | -28.2 °F | -24.1 °F | 0 in. |
| February | -27.3 °F | -22.6 °F | 0 in. |
| March | -25.6 °F | -20.9 °F | 0 in. |
| April | -19.6 °F | -15.1 °F | 304.8 in. |
| May | -16.2 °F | -9.3 °F | 711.2 in. |
| June | -13.4 °F | -6.2 °F | 1066.8 in. |
| July | -11.8 °F | -5.1 °F | 1473.2 in. |
| August | -13 °F | -6.3 °F | 863.6 in. |
| September | -15.1 °F | -9.9 °F | 939.8 in. |
| October | -18 °F | -14.5 °F | 406.4 in. |
| November | -23.5 °F | -20.5 °F | 0 in. |
| December | -27.4 °F | -23.5 °F | 0 in. |
| Annual | 25 °F | 41.6 °F | 8.93 in. |
| 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 : -60°F to -55°F |
| Current Drought Conditions | Normal |