Smiley, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.6 °C (low) to 27.4 °C (high). Annual precipitation averages 872.5 Millimeters. Smiley 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 | 4.9 °C | 17.9 °C | 54.1 mm |
| February | 7.3 °C | 20.1 °C | 50.8 mm |
| March | 10.8 °C | 23.6 °C | 70.36 mm |
| April | 14.2 °C | 27.1 °C | 67.82 mm |
| May | 18.9 °C | 30.7 °C | 105.92 mm |
| June | 22.1 °C | 33.9 °C | 87.88 mm |
| July | 22.9 °C | 35.5 °C | 60.2 mm |
| August | 22.7 °C | 36.2 °C | 72.9 mm |
| September | 20.2 °C | 33.1 °C | 90.93 mm |
| October | 15.1 °C | 28.9 °C | 82.55 mm |
| November | 9.7 °C | 23.1 °C | 67.31 mm |
| December | 6 °C | 18.8 °C | 61.72 mm |
| Annual | 14.6 °C | 27.4 °C | 872.49 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |