Sea Isle City, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48 °F (low) to 62.5 °F (high). Annual precipitation averages 46.3 Inches. Sea Isle City is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.3 °F | 42.3 °F | 3.39 in. |
| February | 28.4 °F | 43.3 °F | 3.04 in. |
| March | 34.9 °F | 49.6 °F | 4.53 in. |
| April | 44.9 °F | 58.0 °F | 3.56 in. |
| May | 53.7 °F | 67.2 °F | 3.46 in. |
| June | 63.7 °F | 76.7 °F | 3.68 in. |
| July | 69.3 °F | 83.8 °F | 4.44 in. |
| August | 68.0 °F | 82.4 °F | 4.4 in. |
| September | 62.1 °F | 76.8 °F | 3.73 in. |
| October | 50.5 °F | 66.7 °F | 4.34 in. |
| November | 40.2 °F | 56.0 °F | 3.4 in. |
| December | 32.6 °F | 47.6 °F | 4.33 in. |
| Annual | 48 °F | 62.5 °F | 46.3 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |