Port Hope, Ontario climate data is summarized below. Average annual temperatures range from 38.6 °F (low) to 52.7 °F (high). Annual precipitation averages 24 Inches. Port Hope 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -22.6 °F | -18.5 °F | 279.4 in. |
| February | -23.2 °F | -18.7 °F | 152.4 in. |
| March | -20.1 °F | -15.7 °F | 1092.2 in. |
| April | -16.7 °F | -12.4 °F | 1701.8 in. |
| May | -13.7 °F | -9 °F | 1600.2 in. |
| June | -10.7 °F | -6.3 °F | 1803.4 in. |
| July | -9.1 °F | -4.5 °F | 2108.2 in. |
| August | -9.2 °F | -4.5 °F | 2184.4 in. |
| September | -11.4 °F | -6.5 °F | 1117.6 in. |
| October | -14.2 °F | -10.1 °F | 1270 in. |
| November | -17.5 °F | -13.5 °F | 1193.8 in. |
| December | -20.4 °F | -17 °F | 939.8 in. |
| Annual | 38.6 °F | 52.7 °F | 23.95 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |