South Amboy, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.4 °F (low) to 63.7 °F (high). Annual precipitation averages 48.3 Inches. South Amboy is located in USDA Plant Hardiness Zone 7b. 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 | 24.3 °F | 40.2 °F | 3.61 in. |
| February | 25.9 °F | 42.9 °F | 2.83 in. |
| March | 32.7 °F | 50.6 °F | 4.21 in. |
| April | 42.4 °F | 62.4 °F | 3.88 in. |
| May | 52.2 °F | 72.1 °F | 3.94 in. |
| June | 61.4 °F | 81.2 °F | 4.53 in. |
| July | 67.1 °F | 86.1 °F | 4.8 in. |
| August | 65.5 °F | 84.2 °F | 4.51 in. |
| September | 58.7 °F | 77.6 °F | 4.23 in. |
| October | 47.4 °F | 65.8 °F | 4.18 in. |
| November | 37.5 °F | 55.5 °F | 3.37 in. |
| December | 29.9 °F | 45.4 °F | 4.24 in. |
| Annual | 45.4 °F | 63.7 °F | 48.33 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |