Somers, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 15.6 °C (high). Annual precipitation averages 1211.8 Millimeters. Somers 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 | -8.1 °C | 1.7 °C | 85.34 mm |
| February | -7.4 °C | 3.2 °C | 76.45 mm |
| March | -2.8 °C | 7.7 °C | 101.85 mm |
| April | 3.1 °C | 15 °C | 101.6 mm |
| May | 8.8 °C | 21.1 °C | 91.44 mm |
| June | 13.8 °C | 25.7 °C | 110.74 mm |
| July | 17 °C | 28.7 °C | 102.11 mm |
| August | 16.1 °C | 27.8 °C | 105.92 mm |
| September | 11.8 °C | 23.9 °C | 113.54 mm |
| October | 5.5 °C | 17.1 °C | 123.44 mm |
| November | 0 °C | 10.6 °C | 90.93 mm |
| December | -4.5 °C | 4.7 °C | 108.46 mm |
| Annual | 4.4 °C | 15.6 °C | 1211.82 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°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 |