Granite Shoals, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.6 °C (low) to 26.3 °C (high). Annual precipitation averages 780.8 Millimeters. Granite Shoals 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 | 1.7 °C | 16.2 °C | 46.74 mm |
| February | 3.9 °C | 18.2 °C | 48.51 mm |
| March | 8.2 °C | 22.2 °C | 67.31 mm |
| April | 12.2 °C | 26.3 °C | 58.67 mm |
| May | 17.3 °C | 29.7 °C | 97.54 mm |
| June | 21.2 °C | 33.5 °C | 70.87 mm |
| July | 22.5 °C | 35.2 °C | 57.15 mm |
| August | 22.4 °C | 35.9 °C | 48.51 mm |
| September | 19.1 °C | 32.4 °C | 79.5 mm |
| October | 13 °C | 27.5 °C | 81.28 mm |
| November | 7.4 °C | 21.3 °C | 69.34 mm |
| December | 2.6 °C | 16.7 °C | 55.37 mm |
| Annual | 12.6 °C | 26.3 °C | 780.79 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |