Yardville, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 17.9 °C (high). Annual precipitation averages 1209.3 Millimeters. Yardville is located in USDA Plant Hardiness Zone 7a. 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 | -4.3 °C | 4.9 °C | 89.92 mm |
| February | -3.4 °C | 6.3 °C | 67.31 mm |
| March | 0.3 °C | 10.7 °C | 110.24 mm |
| April | 5.9 °C | 17.3 °C | 89.15 mm |
| May | 11.2 °C | 22.6 °C | 102.36 mm |
| June | 16.3 °C | 27.7 °C | 112.52 mm |
| July | 19.3 °C | 30.2 °C | 126.75 mm |
| August | 18.4 °C | 29.3 °C | 116.84 mm |
| September | 14.5 °C | 25.7 °C | 103.12 mm |
| October | 8.1 °C | 19.1 °C | 98.81 mm |
| November | 2.4 °C | 13.3 °C | 83.82 mm |
| December | -1.6 °C | 7.6 °C | 108.46 mm |
| Annual | 7.3 °C | 17.9 °C | 1209.3 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |