Bradford, Ontario climate data is summarized below. Average annual temperatures range from 36.8 °F (low) to 54.6 °F (high). Annual precipitation averages 30.2 Inches. Bradford 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.3 °F | -19 °F | 254 in. |
| February | -24 °F | -19.3 °F | 50.8 in. |
| March | -20.7 °F | -15.5 °F | 1041.4 in. |
| April | -17.1 °F | -11.1 °F | 1676.4 in. |
| May | -13.8 °F | -6.9 °F | 2514.6 in. |
| June | -10.9 °F | -4.4 °F | 2717.8 in. |
| July | -9.5 °F | -2.9 °F | 3378.2 in. |
| August | -9.8 °F | -3.5 °F | 2895.6 in. |
| September | -12.2 °F | -5.9 °F | 1778 in. |
| October | -15 °F | -10 °F | 1397 in. |
| November | -18.2 °F | -13.7 °F | 1092.2 in. |
| December | -21.1 °F | -17.5 °F | 711.2 in. |
| Annual | 36.8 °F | 54.6 °F | 30.24 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |