Happy, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 42.9 °F (low) to 72.2 °F (high). Annual precipitation averages 18.2 Inches. Happy is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.7 °F | 51.8 °F | 0.66 in. |
| February | 25.4 °F | 55.7 °F | 0.56 in. |
| March | 32.6 °F | 64.0 °F | 1.39 in. |
| April | 40.2 °F | 72.0 °F | 1.18 in. |
| May | 50.9 °F | 80.5 °F | 2.24 in. |
| June | 60.9 °F | 89.1 °F | 3.03 in. |
| July | 64.4 °F | 91.9 °F | 1.93 in. |
| August | 63.1 °F | 90.5 °F | 2.67 in. |
| September | 55.6 °F | 83.6 °F | 1.69 in. |
| October | 43.4 °F | 73.4 °F | 1.53 in. |
| November | 31.3 °F | 61.3 °F | 0.69 in. |
| December | 23.8 °F | 52.1 °F | 0.6 in. |
| Annual | 42.9 °F | 72.2 °F | 18.17 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |