Brantford, Ontario climate data is summarized below. Average annual temperatures range from 38.7 °F (low) to 56.9 °F (high). Annual precipitation averages 26 Inches. Brantford is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -22.4 °F | -18.4 °F | 254 in. |
| February | -23.3 °F | -18.5 °F | 330.2 in. |
| March | -19.9 °F | -14.4 °F | 1244.6 in. |
| April | -16.7 °F | -10.4 °F | 1498.6 in. |
| May | -13.3 °F | -6.4 °F | 1778 in. |
| June | -10.3 °F | -3.8 °F | 1854.2 in. |
| July | -9.1 °F | -2.3 °F | 2514.6 in. |
| August | -9.4 °F | -2.8 °F | 2438.4 in. |
| September | -11.7 °F | -5.2 °F | 1778 in. |
| October | -14.6 °F | -9.1 °F | 1320.8 in. |
| November | -17.9 °F | -13.1 °F | 965.2 in. |
| December | -20.3 °F | -16.7 °F | 762 in. |
| Annual | 38.7 °F | 56.9 °F | 25.95 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |