Valentine, Arizona has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 46.1 °F (low) to 75.9 °F (high). Annual precipitation averages 11.7 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.1 °F | 56.6 °F | 1.2 in. |
| February | 32.2 °F | 59.8 °F | 1.35 in. |
| March | 36.1 °F | 66.2 °F | 1.23 in. |
| April | 42.0 °F | 72.3 °F | 0.55 in. |
| May | 50.4 °F | 82.2 °F | 0.3 in. |
| June | 59.4 °F | 92.9 °F | 0.06 in. |
| July | 66.2 °F | 96.9 °F | 1.63 in. |
| August | 65.9 °F | 95.6 °F | 1.86 in. |
| September | 57.8 °F | 89.3 °F | 1.37 in. |
| October | 46.4 °F | 77.6 °F | 0.76 in. |
| November | 36.9 °F | 65.7 °F | 0.53 in. |
| December | 30.2 °F | 55.7 °F | 0.83 in. |
| Annual | 46.1 °F | 75.9 °F | 11.67 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |