Kearney, Ontario climate data is summarized below. Average annual temperatures range from 31 °F (low) to 50.7 °F (high). Annual precipitation averages 26.6 Inches. Kearney is located in USDA Plant Hardiness Zone 4b. 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 | -26.4 °F | -20.8 °F | 0 in. |
| February | -26.8 °F | -20.6 °F | 0 in. |
| March | -22.8 °F | -16.9 °F | 533.4 in. |
| April | -18.7 °F | -12.3 °F | 1600.2 in. |
| May | -14.9 °F | -7.6 °F | 1955.8 in. |
| June | -12 °F | -5.1 °F | 2082.8 in. |
| July | -10.8 °F | -4 °F | 2514.6 in. |
| August | -11.1 °F | -4.5 °F | 2260.6 in. |
| September | -13.7 °F | -7 °F | 2209.8 in. |
| October | -16.3 °F | -11.1 °F | 2616.2 in. |
| November | -19.7 °F | -15.1 °F | 1346.2 in. |
| December | -23.8 °F | -19.3 °F | 0 in. |
| Annual | 31 °F | 50.7 °F | 26.55 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 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |