Valentine, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 46 °F (low) to 78.3 °F (high). Annual precipitation averages 12.6 Inches. Valentine is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.9 °F | 60.3 °F | 0.41 in. |
| February | 31.7 °F | 65.3 °F | 0.43 in. |
| March | 37.4 °F | 72.5 °F | 0.33 in. |
| April | 44.3 °F | 80.5 °F | 0.27 in. |
| May | 53.3 °F | 87.9 °F | 0.67 in. |
| June | 62.1 °F | 94.1 °F | 1.67 in. |
| July | 63.9 °F | 92.3 °F | 2.64 in. |
| August | 62.7 °F | 91.3 °F | 2.16 in. |
| September | 57.4 °F | 86.0 °F | 1.84 in. |
| October | 47.0 °F | 79.9 °F | 1.11 in. |
| November | 35.8 °F | 68.8 °F | 0.56 in. |
| December | 29.0 °F | 60.9 °F | 0.48 in. |
| Annual | 46 °F | 78.3 °F | 12.57 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |