Frenchtown, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.4 °F (low) to 63.6 °F (high). Annual precipitation averages 50 Inches. Frenchtown is located in USDA Plant Hardiness Zone 7a. 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 | 21.6 °F | 39.3 °F | 3.57 in. |
| February | 22.9 °F | 42.0 °F | 2.99 in. |
| March | 29.8 °F | 50.5 °F | 4.17 in. |
| April | 39.6 °F | 63.1 °F | 3.97 in. |
| May | 49.7 °F | 72.7 °F | 4.23 in. |
| June | 59.3 °F | 81.7 °F | 4.64 in. |
| July | 64.2 °F | 86.4 °F | 5.11 in. |
| August | 62.2 °F | 84.3 °F | 4.58 in. |
| September | 54.8 °F | 77.9 °F | 4.58 in. |
| October | 43.7 °F | 66.1 °F | 4.37 in. |
| November | 34.0 °F | 54.7 °F | 3.41 in. |
| December | 26.9 °F | 44.2 °F | 4.41 in. |
| Annual | 42.4 °F | 63.6 °F | 50.03 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |