Lake Pocotopaug, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 15.5 °C (high). Annual precipitation averages 1299.7 Millimeters. Lake Pocotopaug is located in USDA Plant Hardiness Zone 6b. 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 | -7.1 °C | 2.2 °C | 96.52 mm |
| February | -6.5 °C | 3.7 °C | 83.82 mm |
| March | -2.5 °C | 7.9 °C | 115.82 mm |
| April | 2.9 °C | 14.7 °C | 109.98 mm |
| May | 8.3 °C | 20.4 °C | 97.54 mm |
| June | 13.6 °C | 25.1 °C | 115.06 mm |
| July | 16.6 °C | 28 °C | 105.41 mm |
| August | 15.8 °C | 27.2 °C | 110.49 mm |
| September | 11.8 °C | 23.4 °C | 116.59 mm |
| October | 5.7 °C | 16.9 °C | 129.29 mm |
| November | 0.6 °C | 10.8 °C | 102.11 mm |
| December | -3.7 °C | 5.4 °C | 117.09 mm |
| Annual | 4.6 °C | 15.5 °C | 1299.72 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |