Port Hope Simpson, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 27.4 °F (low) to 39.9 °F (high). Annual precipitation averages 21.6 Inches. Port Hope Simpson is located in USDA Plant Hardiness Zone 3a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.6 °F | -22.3 °F | 355.6 in. |
| February | -26.5 °F | -21.9 °F | 152.4 in. |
| March | -24.1 °F | -20.2 °F | 355.6 in. |
| April | -20.8 °F | -17.6 °F | 558.8 in. |
| May | -18 °F | -14.2 °F | 1320.8 in. |
| June | -15 °F | -10.4 °F | 1498.6 in. |
| July | -12.5 °F | -7.6 °F | 1905 in. |
| August | -12.2 °F | -7.6 °F | 1524 in. |
| September | -14.4 °F | -10.4 °F | 1803.4 in. |
| October | -16.9 °F | -14 °F | 2260.6 in. |
| November | -19.8 °F | -17.3 °F | 1397 in. |
| December | -23.6 °F | -20.4 °F | 812.8 in. |
| Annual | 27.4 °F | 39.9 °F | 21.62 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3a : -40°F to -35°F |
| Current Drought Conditions | Normal |