Pembroke, Ontario climate data is summarized below. Average annual temperatures range from 32.6 °F (low) to 52.1 °F (high). Annual precipitation averages 25.2 Inches. Pembroke is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.4 °F | -20.9 °F | 0 in. |
| February | -26.4 °F | -20.4 °F | 0 in. |
| March | -22.7 °F | -16.6 °F | 558.8 in. |
| April | -17.9 °F | -11.4 °F | 1574.8 in. |
| May | -14.3 °F | -7 °F | 1905 in. |
| June | -11.5 °F | -4.5 °F | 1981.2 in. |
| July | -10.1 °F | -3.2 °F | 2641.6 in. |
| August | -10.4 °F | -3.9 °F | 2260.6 in. |
| September | -13 °F | -6.5 °F | 2057.4 in. |
| October | -15.9 °F | -10.6 °F | 2057.4 in. |
| November | -19.2 °F | -14.7 °F | 1143 in. |
| December | -23.6 °F | -19.3 °F | 101.6 in. |
| Annual | 32.6 °F | 52.1 °F | 25.23 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |