Canton Valley, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.4 °C (low) to 15.3 °C (high). Annual precipitation averages 1337.1 Millimeters. Canton Valley 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | 1.4 °C | 93.47 mm |
| February | -8.2 °C | 3.1 °C | 84.07 mm |
| March | -4.1 °C | 7.5 °C | 108.46 mm |
| April | 1.7 °C | 14.8 °C | 102.62 mm |
| May | 7.6 °C | 20.9 °C | 103.38 mm |
| June | 12.8 °C | 25.6 °C | 120.4 mm |
| July | 15.7 °C | 28.3 °C | 117.86 mm |
| August | 14.8 °C | 27.3 °C | 120.4 mm |
| September | 10.7 °C | 23.3 °C | 125.73 mm |
| October | 4.3 °C | 16.5 °C | 141.73 mm |
| November | -0.9 °C | 10.1 °C | 101.35 mm |
| December | -5.4 °C | 4.2 °C | 117.6 mm |
| Annual | 3.4 °C | 15.3 °C | 1337.07 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |