Justice, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 21.4 °C (high). Annual precipitation averages 1114.8 Millimeters. Justice is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.6 °C | 8.6 °C | 46.48 mm |
| February | -1.8 °C | 11.3 °C | 51.05 mm |
| March | 3.1 °C | 16.3 °C | 87.38 mm |
| April | 8.2 °C | 21.3 °C | 114.55 mm |
| May | 13.9 °C | 25.4 °C | 151.64 mm |
| June | 19.1 °C | 30.1 °C | 124.97 mm |
| July | 21.3 °C | 33.2 °C | 100.84 mm |
| August | 20.3 °C | 33.3 °C | 90.17 mm |
| September | 15.7 °C | 28.9 °C | 101.6 mm |
| October | 9.1 °C | 22.8 °C | 95.25 mm |
| November | 2.9 °C | 16 °C | 85.09 mm |
| December | -1.8 °C | 9.9 °C | 65.79 mm |
| Annual | 8.9 °C | 21.4 °C | 1114.81 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |