Listowel, Ontario climate data is summarized below. Average annual temperatures range from 36.1 °F (low) to 52.8 °F (high). Annual precipitation averages 13.6 Inches. Listowel is located in USDA Plant Hardiness Zone 5b. 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 | -23.5 °F | -19.6 °F | 0 in. |
| February | -24.4 °F | -19.8 °F | 0 in. |
| March | -21 °F | -15.9 °F | 558.8 in. |
| April | -17.4 °F | -11.6 °F | 558.8 in. |
| May | -13.8 °F | -7.6 °F | 1041.4 in. |
| June | -11.2 °F | -5 °F | 1270 in. |
| July | -10 °F | -3.8 °F | 1930.4 in. |
| August | -10.2 °F | -4.3 °F | 1701.8 in. |
| September | -12.3 °F | -6.5 °F | 889 in. |
| October | -15 °F | -10.4 °F | 406.4 in. |
| November | -18.2 °F | -14.2 °F | 279.4 in. |
| December | -21.1 °F | -17.9 °F | 127 in. |
| Annual | 36.1 °F | 52.8 °F | 13.59 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |