Shiner, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.5 °C (low) to 26.8 °C (high). Annual precipitation averages 960.6 Millimeters. Shiner is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.9 °C | 17.3 °C | 68.58 mm |
| February | 7.1 °C | 19.3 °C | 49.78 mm |
| March | 10.7 °C | 22.9 °C | 73.41 mm |
| April | 14.1 °C | 26.6 °C | 73.66 mm |
| May | 18.7 °C | 30.1 °C | 106.43 mm |
| June | 21.9 °C | 33.3 °C | 103.63 mm |
| July | 22.8 °C | 34.9 °C | 60.2 mm |
| August | 22.8 °C | 35.7 °C | 81.28 mm |
| September | 20.2 °C | 32.7 °C | 87.88 mm |
| October | 15.1 °C | 28.3 °C | 109.47 mm |
| November | 9.7 °C | 22.4 °C | 78.49 mm |
| December | 5.8 °C | 18.2 °C | 67.82 mm |
| Annual | 14.5 °C | 26.8 °C | 960.63 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 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 |