Churchill Falls, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from -6.6 °C (low) to 3.1 °C (high). Annual precipitation averages 530 Millimeters. 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 | -24.64 °C | -14.51 °C | 0 mm |
| February | -24.85 °C | -12.56 °C | 0 mm |
| March | -21.26 °C | -7.29 °C | 0 mm |
| April | -10.59 °C | 0.76 °C | 3 mm |
| May | -1.88 °C | 7.24 °C | 66 mm |
| June | 6.52 °C | 17.13 °C | 87 mm |
| July | 10.73 °C | 20.56 °C | 105 mm |
| August | 10.61 °C | 19.6 °C | 108 mm |
| September | 4.73 °C | 12.96 °C | 90 mm |
| October | 0.12 °C | 6.03 °C | 63 mm |
| November | -8.53 °C | -1.8 °C | 8 mm |
| December | -20.2 °C | -11.18 °C | 0 mm |
| Annual | -6.6 °C | 3.1 °C | 530 mm |
| 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 : |
| Current Drought Conditions | Normal |