Torrington, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.3 °C (low) to 15.6 °C (high). Annual precipitation averages 1347 Millimeters. Torrington 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 | -8.9 °C | 1.8 °C | 97.03 mm |
| February | -8.2 °C | 3.6 °C | 80.77 mm |
| March | -4.1 °C | 7.9 °C | 114.81 mm |
| April | 1.6 °C | 15.2 °C | 97.79 mm |
| May | 7.4 °C | 21.3 °C | 102.87 mm |
| June | 12.7 °C | 25.9 °C | 118.87 mm |
| July | 15.6 °C | 28.6 °C | 117.6 mm |
| August | 14.6 °C | 27.6 °C | 123.44 mm |
| September | 10.5 °C | 23.4 °C | 131.06 mm |
| October | 4.2 °C | 16.7 °C | 141.22 mm |
| November | -1.1 °C | 10.5 °C | 102.62 mm |
| December | -5.3 °C | 4.5 °C | 118.87 mm |
| Annual | 3.3 °C | 15.6 °C | 1346.95 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 | Dfb - Humid Continental Mild Summer, Wet All Year |