Fennells Corner, Ontario climate data is summarized below. Average annual temperatures range from 36.3 °F (low) to 53.9 °F (high). Annual precipitation averages 29.2 Inches. Fennells Corner is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.5 °F | -19.2 °F | 228.6 in. |
| February | -24.2 °F | -19.4 °F | 0 in. |
| March | -21.2 °F | -15.7 °F | 914.4 in. |
| April | -17.4 °F | -11.4 °F | 1549.4 in. |
| May | -13.9 °F | -7.1 °F | 2362.2 in. |
| June | -11.1 °F | -4.6 °F | 2641.6 in. |
| July | -9.6 °F | -3.2 °F | 3606.8 in. |
| August | -9.9 °F | -3.8 °F | 2895.6 in. |
| September | -12.2 °F | -6.2 °F | 1701.8 in. |
| October | -15.1 °F | -10.2 °F | 1320.8 in. |
| November | -18.3 °F | -13.9 °F | 990.6 in. |
| December | -21.2 °F | -17.7 °F | 609.6 in. |
| Annual | 36.3 °F | 53.9 °F | 29.17 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |