Kensington, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 16 °C (high). Annual precipitation averages 1299 Millimeters. Kensington is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 2.4 °C | 98.04 mm |
| February | -6.1 °C | 3.8 °C | 86.11 mm |
| March | -1.8 °C | 8.3 °C | 104.65 mm |
| April | 3.9 °C | 15.2 °C | 104.65 mm |
| May | 9.6 °C | 21.2 °C | 97.03 mm |
| June | 14.8 °C | 25.9 °C | 123.7 mm |
| July | 17.8 °C | 29.1 °C | 105.92 mm |
| August | 16.9 °C | 28.1 °C | 108.71 mm |
| September | 12.8 °C | 24.1 °C | 115.82 mm |
| October | 6.4 °C | 17.4 °C | 136.65 mm |
| November | 0.9 °C | 11.1 °C | 99.57 mm |
| December | -3.6 °C | 5.4 °C | 118.11 mm |
| Annual | 5.4 °C | 16 °C | 1298.96 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |