Joshua, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.9 °F (low) to 76.9 °F (high). Annual precipitation averages 38 Inches. Joshua 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 | 34.0 °F | 57.7 °F | 2.46 in. |
| February | 37.9 °F | 61.3 °F | 2.66 in. |
| March | 44.9 °F | 68.1 °F | 3.53 in. |
| April | 52.4 °F | 75.8 °F | 3.22 in. |
| May | 62.1 °F | 83.2 °F | 4.61 in. |
| June | 70.1 °F | 91.2 °F | 3.85 in. |
| July | 73.2 °F | 95.5 °F | 1.93 in. |
| August | 72.8 °F | 95.7 °F | 2.6 in. |
| September | 65.5 °F | 88.8 °F | 3.17 in. |
| October | 54.6 °F | 79.1 °F | 4.31 in. |
| November | 44.0 °F | 67.2 °F | 2.91 in. |
| December | 35.7 °F | 58.7 °F | 2.71 in. |
| Annual | 53.9 °F | 76.9 °F | 37.96 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 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |