Retreat, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.3 °F (low) to 77.1 °F (high). Annual precipitation averages 41.9 Inches. Retreat 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 | 35.9 °F | 57.6 °F | 3.12 in. |
| February | 39.6 °F | 61.8 °F | 3.23 in. |
| March | 46.8 °F | 68.7 °F | 3.89 in. |
| April | 53.8 °F | 76.1 °F | 3.82 in. |
| May | 63.3 °F | 83.3 °F | 4.32 in. |
| June | 70.8 °F | 90.6 °F | 3.93 in. |
| July | 73.6 °F | 94.8 °F | 2.03 in. |
| August | 73.3 °F | 95.8 °F | 2.48 in. |
| September | 66.6 °F | 89.7 °F | 3.11 in. |
| October | 55.8 °F | 79.4 °F | 5.05 in. |
| November | 45.6 °F | 67.9 °F | 3.26 in. |
| December | 37.9 °F | 59.5 °F | 3.61 in. |
| Annual | 55.3 °F | 77.1 °F | 41.85 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |