Housatonic, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 58.3 °F (high). Annual precipitation averages 45.7 Inches. Housatonic is located in USDA Plant Hardiness Zone 5b. 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 | 13.7 °F | 32.6 °F | 3.18 in. |
| February | 15.1 °F | 35.8 °F | 2.36 in. |
| March | 23.4 °F | 44.0 °F | 3.26 in. |
| April | 33.8 °F | 58.0 °F | 3.75 in. |
| May | 44.7 °F | 69.7 °F | 3.71 in. |
| June | 53.8 °F | 77.2 °F | 4.55 in. |
| July | 58.6 °F | 82.0 °F | 4.63 in. |
| August | 57.3 °F | 80.0 °F | 4.59 in. |
| September | 49.2 °F | 72.8 °F | 4.16 in. |
| October | 38.3 °F | 60.6 °F | 4.4 in. |
| November | 29.5 °F | 48.8 °F | 3.34 in. |
| December | 21.0 °F | 37.6 °F | 3.78 in. |
| Annual | 36.5 °F | 58.3 °F | 45.71 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |