Churchill Falls, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 20.1 °F (low) to 37.6 °F (high). Annual precipitation averages 20.9 Inches. Churchill Falls is located in USDA Plant Hardiness Zone 1b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -31.5 °F | -25.8 °F | 0 in. |
| February | -31.6 °F | -24.8 °F | 0 in. |
| March | -29.6 °F | -21.8 °F | 0 in. |
| April | -23.7 °F | -17.4 °F | 76.2 in. |
| May | -18.8 °F | -13.8 °F | 1676.4 in. |
| June | -14.2 °F | -8.3 °F | 2209.8 in. |
| July | -11.8 °F | -6.4 °F | 2667 in. |
| August | -11.9 °F | -6.9 °F | 2743.2 in. |
| September | -15.2 °F | -10.6 °F | 2286 in. |
| October | -17.7 °F | -14.4 °F | 1600.2 in. |
| November | -22.5 °F | -18.8 °F | 203.2 in. |
| December | -29 °F | -24 °F | 0 in. |
| Annual | 20.1 °F | 37.6 °F | 20.86 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 1b : -55°F to -50°F |
| Current Drought Conditions | Normal |