Juliustown, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.2 °C (low) to 18 °C (high). Annual precipitation averages 1193.5 Millimeters. Juliustown 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 | 5.1 °C | 90.42 mm |
| February | -3.7 °C | 6.6 °C | 69.34 mm |
| March | 0.2 °C | 10.8 °C | 110.74 mm |
| April | 5.7 °C | 17.4 °C | 82.8 mm |
| May | 11.1 °C | 22.7 °C | 97.79 mm |
| June | 16.3 °C | 27.8 °C | 109.22 mm |
| July | 19.2 °C | 30.2 °C | 122.43 mm |
| August | 18.3 °C | 29.3 °C | 123.19 mm |
| September | 14.5 °C | 25.8 °C | 99.06 mm |
| October | 8.1 °C | 19.3 °C | 100.33 mm |
| November | 2.4 °C | 13.4 °C | 81.53 mm |
| December | -1.6 °C | 7.8 °C | 106.68 mm |
| Annual | 7.2 °C | 18 °C | 1193.53 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |