Rockton, Ontario climate data is summarized below. Average annual temperatures range from 3.5 °C (low) to 13.5 °C (high). Annual precipitation averages 969 Millimeters. Rockton 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.62 °C | -1.23 °C | 24 mm |
| February | -10.12 °C | -1.54 °C | 29 mm |
| March | -4.54 °C | 5.44 °C | 72 mm |
| April | 1.85 °C | 12.85 °C | 99 mm |
| May | 7.99 °C | 19.99 °C | 109 mm |
| June | 13.29 °C | 24.77 °C | 107 mm |
| July | 15.63 °C | 27.55 °C | 121 mm |
| August | 15.03 °C | 26.63 °C | 109 mm |
| September | 10.88 °C | 22.27 °C | 89 mm |
| October | 5.57 °C | 15.17 °C | 86 mm |
| November | -0.11 °C | 8.19 °C | 65 mm |
| December | -4.71 °C | 1.71 °C | 59 mm |
| Annual | 3.5 °C | 13.5 °C | 969 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |