Briar, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.2 °F (low) to 76.7 °F (high). Annual precipitation averages 36.7 Inches. Briar is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.7 °F | 56.6 °F | 2.14 in. |
| February | 37.4 °F | 60.2 °F | 2.48 in. |
| March | 45.2 °F | 68.4 °F | 3.23 in. |
| April | 52.7 °F | 75.9 °F | 3.06 in. |
| May | 62.6 °F | 83.0 °F | 4.4 in. |
| June | 70.7 °F | 91.6 °F | 4.04 in. |
| July | 74.0 °F | 95.4 °F | 2.2 in. |
| August | 73.5 °F | 96.3 °F | 2.51 in. |
| September | 66.1 °F | 89.0 °F | 3.32 in. |
| October | 54.6 °F | 78.5 °F | 4.12 in. |
| November | 44.5 °F | 66.9 °F | 2.65 in. |
| December | 35.9 °F | 58.1 °F | 2.51 in. |
| Annual | 54.2 °F | 76.7 °F | 36.66 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 |