Olmos Park, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58.3 °F (low) to 80.7 °F (high). Annual precipitation averages 33.4 Inches. Olmos Park is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.4 °F | 63.6 °F | 2.02 in. |
| February | 44.3 °F | 67.9 °F | 2.01 in. |
| March | 51.1 °F | 74.2 °F | 2.52 in. |
| April | 57.6 °F | 80.7 °F | 2.35 in. |
| May | 66.2 °F | 86.8 °F | 3.9 in. |
| June | 72.2 °F | 92.5 °F | 3.37 in. |
| July | 73.9 °F | 95.1 °F | 2.28 in. |
| August | 73.9 °F | 96.3 °F | 2.37 in. |
| September | 69.0 °F | 90.7 °F | 3.83 in. |
| October | 59.7 °F | 82.7 °F | 3.91 in. |
| November | 49.4 °F | 72.3 °F | 2.63 in. |
| December | 42.1 °F | 65.0 °F | 2.23 in. |
| Annual | 58.3 °F | 80.7 °F | 33.42 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |