Stirling, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 17.2 °C (high). Annual precipitation averages 1258.1 Millimeters. Stirling 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 | -5.9 °C | 3.8 °C | 94.23 mm |
| February | -5.2 °C | 5.3 °C | 73.91 mm |
| March | -1.3 °C | 9.9 °C | 110.49 mm |
| April | 4.6 °C | 16.8 °C | 101.09 mm |
| May | 9.9 °C | 22.2 °C | 103.63 mm |
| June | 14.9 °C | 27.1 °C | 120.4 mm |
| July | 17.8 °C | 29.8 °C | 120.4 mm |
| August | 16.9 °C | 28.8 °C | 116.33 mm |
| September | 12.9 °C | 25.1 °C | 107.95 mm |
| October | 6.4 °C | 18.4 °C | 110.24 mm |
| November | 1 °C | 12.3 °C | 89.66 mm |
| December | -2.9 °C | 6.6 °C | 109.73 mm |
| Annual | 5.8 °C | 17.2 °C | 1258.06 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |