Pleasant Valley, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.6 °C (low) to 15.5 °C (high). Annual precipitation averages 1316.7 Millimeters. Pleasant 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 | -8.7 °C | 1.6 °C | 92.96 mm |
| February | -8 °C | 3.3 °C | 82.04 mm |
| March | -3.8 °C | 7.8 °C | 109.22 mm |
| April | 1.9 °C | 15.2 °C | 101.09 mm |
| May | 7.9 °C | 21.3 °C | 103.12 mm |
| June | 13.2 °C | 26 °C | 123.19 mm |
| July | 16 °C | 28.7 °C | 114.55 mm |
| August | 15.1 °C | 27.6 °C | 114.81 mm |
| September | 10.9 °C | 23.6 °C | 124.21 mm |
| October | 4.6 °C | 16.7 °C | 134.87 mm |
| November | -0.7 °C | 10.3 °C | 100.58 mm |
| December | -5.2 °C | 4.3 °C | 116.08 mm |
| Annual | 3.6 °C | 15.5 °C | 1316.72 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 |