Metuchen, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.3 °F (low) to 63.9 °F (high). Annual precipitation averages 48.6 Inches. Metuchen 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 | 23.4 °F | 40.1 °F | 3.6 in. |
| February | 24.8 °F | 42.9 °F | 2.84 in. |
| March | 31.6 °F | 50.8 °F | 4.21 in. |
| April | 41.7 °F | 62.9 °F | 3.87 in. |
| May | 51.3 °F | 72.7 °F | 4.0 in. |
| June | 60.6 °F | 81.7 °F | 4.53 in. |
| July | 66.0 °F | 86.6 °F | 4.97 in. |
| August | 64.5 °F | 84.6 °F | 4.51 in. |
| September | 57.4 °F | 78.0 °F | 4.28 in. |
| October | 45.5 °F | 66.0 °F | 4.21 in. |
| November | 35.8 °F | 55.3 °F | 3.38 in. |
| December | 28.7 °F | 45.2 °F | 4.22 in. |
| Annual | 44.3 °F | 63.9 °F | 48.62 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 7a : 0°F to 5°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 |