Marksboro, New Jersey has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.6 °F (low) to 61.3 °F (high). Annual precipitation averages 48.6 Inches. Marksboro is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.3 °F | 36.6 °F | 3.45 in. |
| February | 19.7 °F | 39.8 °F | 2.76 in. |
| March | 26.7 °F | 48.2 °F | 3.9 in. |
| April | 37.2 °F | 61.1 °F | 3.74 in. |
| May | 47.6 °F | 71.2 °F | 3.98 in. |
| June | 56.6 °F | 79.0 °F | 4.93 in. |
| July | 61.5 °F | 83.8 °F | 4.42 in. |
| August | 59.8 °F | 82.0 °F | 4.77 in. |
| September | 52.5 °F | 75.6 °F | 4.65 in. |
| October | 40.8 °F | 63.8 °F | 4.53 in. |
| November | 30.8 °F | 52.6 °F | 3.38 in. |
| December | 24.0 °F | 41.9 °F | 4.1 in. |
| Annual | 39.6 °F | 61.3 °F | 48.61 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |