Bancroft, Ontario climate data is summarized below. Average annual temperatures range from 30.6 °F (low) to 52 °F (high). Annual precipitation averages 12.3 Inches. Bancroft is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.2 °F | -20.3 °F | 0 in. |
| February | -26.7 °F | -20 °F | 0 in. |
| March | -23 °F | -16.4 °F | 254 in. |
| April | -18.7 °F | -11.6 °F | 533.4 in. |
| May | -15.1 °F | -7.2 °F | 762 in. |
| June | -12.2 °F | -5 °F | 1320.8 in. |
| July | -10.9 °F | -3.7 °F | 1727.2 in. |
| August | -11.4 °F | -4.2 °F | 1651 in. |
| September | -14.1 °F | -6.7 °F | 787.4 in. |
| October | -16.6 °F | -10.8 °F | 533.4 in. |
| November | -20.1 °F | -14.7 °F | 177.8 in. |
| December | -23.7 °F | -18.9 °F | 152.4 in. |
| Annual | 30.6 °F | 52 °F | 12.26 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |