Flemington, 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 °F (high). Annual precipitation averages 50.3 Inches. Flemington 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 | 21.4 °F | 39.0 °F | 3.68 in. |
| February | 22.6 °F | 41.6 °F | 2.95 in. |
| March | 29.8 °F | 50.0 °F | 4.34 in. |
| April | 39.9 °F | 62.4 °F | 4.08 in. |
| May | 50.0 °F | 72.1 °F | 4.28 in. |
| June | 59.1 °F | 81.0 °F | 4.66 in. |
| July | 64.2 °F | 85.9 °F | 5.21 in. |
| August | 62.7 °F | 83.9 °F | 4.52 in. |
| September | 55.3 °F | 77.3 °F | 4.38 in. |
| October | 43.9 °F | 65.2 °F | 4.28 in. |
| November | 33.7 °F | 54.2 °F | 3.42 in. |
| December | 26.7 °F | 43.9 °F | 4.53 in. |
| Annual | 42.4 °F | 63 °F | 50.33 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |