Junction, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51 °F (low) to 79.3 °F (high). Annual precipitation averages 22.2 Inches. Junction is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.1 °F | 61.3 °F | 0.92 in. |
| February | 35.3 °F | 65.4 °F | 1.12 in. |
| March | 43.1 °F | 72.3 °F | 1.84 in. |
| April | 50.6 °F | 80.2 °F | 2.04 in. |
| May | 60.4 °F | 86.1 °F | 2.89 in. |
| June | 67.9 °F | 92.4 °F | 2.85 in. |
| July | 69.3 °F | 95.0 °F | 1.49 in. |
| August | 68.8 °F | 95.7 °F | 1.84 in. |
| September | 62.3 °F | 89.2 °F | 2.53 in. |
| October | 51.4 °F | 81.1 °F | 2.03 in. |
| November | 40.4 °F | 70.1 °F | 1.49 in. |
| December | 31.9 °F | 62.4 °F | 1.2 in. |
| Annual | 51 °F | 79.3 °F | 22.24 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |