Rose Blanche, Newfoundland and Labrador climate data is summarized below. Rose Blanche is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Nov. 1 - Nov. 10.
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |