Higganum, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.2 °F (low) to 60.8 °F (high). Annual precipitation averages 52.5 Inches. Higganum 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 | 37.0 °F | 4.02 in. |
| February | 21.0 °F | 39.7 °F | 3.44 in. |
| March | 28.6 °F | 47.4 °F | 4.72 in. |
| April | 38.4 °F | 59.5 °F | 4.55 in. |
| May | 48.3 °F | 69.7 °F | 3.8 in. |
| June | 57.8 °F | 78.3 °F | 4.89 in. |
| July | 63.6 °F | 83.5 °F | 3.94 in. |
| August | 62.0 °F | 82.3 °F | 4.4 in. |
| September | 54.2 °F | 74.8 °F | 4.47 in. |
| October | 42.6 °F | 63.1 °F | 5.3 in. |
| November | 33.0 °F | 52.4 °F | 4.23 in. |
| December | 25.2 °F | 42.4 °F | 4.75 in. |
| Annual | 41.2 °F | 60.8 °F | 52.51 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 | Dfb - Humid Continental Mild Summer, Wet All Year |