Johnson City, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.4 °F (low) to 78.3 °F (high). Annual precipitation averages 33.3 Inches. Johnson City is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 60.8 °F | 2.11 in. |
| February | 39.8 °F | 64.3 °F | 1.97 in. |
| March | 46.6 °F | 71.2 °F | 2.54 in. |
| April | 53.5 °F | 78.2 °F | 2.38 in. |
| May | 62.8 °F | 84.4 °F | 4.48 in. |
| June | 69.2 °F | 90.8 °F | 2.99 in. |
| July | 71.2 °F | 93.9 °F | 2.23 in. |
| August | 71.0 °F | 95.2 °F | 2.18 in. |
| September | 65.1 °F | 88.8 °F | 3.7 in. |
| October | 54.9 °F | 80.5 °F | 3.61 in. |
| November | 45.3 °F | 69.4 °F | 2.94 in. |
| December | 37.2 °F | 62.0 °F | 2.16 in. |
| Annual | 54.4 °F | 78.3 °F | 33.29 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |