Whitney, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.7 °C (low) to 25.6 °C (high). Annual precipitation averages 934.5 Millimeters. Whitney 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 | 14.6 °C | 66.55 mm |
| February | 3.8 °C | 16.8 °C | 63.5 mm |
| March | 8 °C | 20.7 °C | 87.63 mm |
| April | 12.1 °C | 25.1 °C | 83.82 mm |
| May | 17.3 °C | 29.3 °C | 116.08 mm |
| June | 21.4 °C | 33.4 °C | 96.27 mm |
| July | 22.9 °C | 35.8 °C | 42.16 mm |
| August | 22.8 °C | 36.1 °C | 56.64 mm |
| September | 19.1 °C | 32.5 °C | 72.9 mm |
| October | 13.1 °C | 26.8 °C | 107.44 mm |
| November | 7.3 °C | 20.2 °C | 70.61 mm |
| December | 2.8 °C | 15.5 °C | 70.87 mm |
| Annual | 12.7 °C | 25.6 °C | 934.47 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |