Naugatuck, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41 °F (low) to 60.8 °F (high). Annual precipitation averages 52.4 Inches. Naugatuck 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.4 °F | 36.7 °F | 3.92 in. |
| February | 20.7 °F | 39.3 °F | 3.35 in. |
| March | 27.9 °F | 46.9 °F | 4.66 in. |
| April | 38.2 °F | 59.1 °F | 4.25 in. |
| May | 48.3 °F | 70.3 °F | 4.21 in. |
| June | 57.6 °F | 78.4 °F | 4.58 in. |
| July | 63.2 °F | 84.0 °F | 4.37 in. |
| August | 61.6 °F | 82.1 °F | 4.3 in. |
| September | 54.4 °F | 75.4 °F | 4.63 in. |
| October | 42.8 °F | 63.6 °F | 5.3 in. |
| November | 33.0 °F | 52.1 °F | 4.17 in. |
| December | 25.2 °F | 41.8 °F | 4.61 in. |
| Annual | 41 °F | 60.8 °F | 52.35 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |