Alexandria, Ontario climate data is summarized below. Average annual temperatures range from 34.7 °F (low) to 53.3 °F (high). Annual precipitation averages 24.2 Inches. Alexandria is located in USDA Plant Hardiness Zone 5a. 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 | -25.6 °F | -20.4 °F | 0 in. |
| February | -25.4 °F | -20.1 °F | 0 in. |
| March | -21.9 °F | -16.4 °F | 508 in. |
| April | -17.3 °F | -11.3 °F | 1422.4 in. |
| May | -13.6 °F | -6.9 °F | 1727.2 in. |
| June | -10.7 °F | -4.4 °F | 2387.6 in. |
| July | -9.3 °F | -2.9 °F | 2819.4 in. |
| August | -9.8 °F | -3.4 °F | 2260.6 in. |
| September | -12.5 °F | -5.9 °F | 1701.8 in. |
| October | -15.5 °F | -10.1 °F | 1752.6 in. |
| November | -18.9 °F | -14.1 °F | 838.2 in. |
| December | -22.8 °F | -18.7 °F | 203.2 in. |
| Annual | 34.7 °F | 53.3 °F | 24.21 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 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |