Olmos Park, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.6 °C (low) to 27 °C (high). Annual precipitation averages 848.9 Millimeters. 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 | 4.7 °C | 17.6 °C | 51.31 mm |
| February | 6.8 °C | 19.9 °C | 51.05 mm |
| March | 10.6 °C | 23.4 °C | 64.01 mm |
| April | 14.2 °C | 27.1 °C | 59.69 mm |
| May | 19 °C | 30.4 °C | 99.06 mm |
| June | 22.3 °C | 33.6 °C | 85.6 mm |
| July | 23.3 °C | 35.1 °C | 57.91 mm |
| August | 23.3 °C | 35.7 °C | 60.2 mm |
| September | 20.6 °C | 32.6 °C | 97.28 mm |
| October | 15.4 °C | 28.2 °C | 99.31 mm |
| November | 9.7 °C | 22.4 °C | 66.8 mm |
| December | 5.6 °C | 18.3 °C | 56.64 mm |
| Annual | 14.6 °C | 27 °C | 848.86 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |