Hays, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.1 °F (low) to 78.9 °F (high). Annual precipitation averages 38.4 Inches. Hays is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.8 °F | 61.3 °F | 2.71 in. |
| February | 41.7 °F | 64.7 °F | 2.12 in. |
| March | 48.5 °F | 71.4 °F | 3.08 in. |
| April | 55.2 °F | 78.3 °F | 2.64 in. |
| May | 64.2 °F | 85.0 °F | 5.17 in. |
| June | 70.6 °F | 91.3 °F | 3.61 in. |
| July | 72.5 °F | 94.5 °F | 2.34 in. |
| August | 72.4 °F | 96.1 °F | 2.56 in. |
| September | 67.0 °F | 89.9 °F | 3.81 in. |
| October | 56.9 °F | 81.2 °F | 4.4 in. |
| November | 47.0 °F | 70.3 °F | 3.02 in. |
| December | 39.2 °F | 62.5 °F | 2.98 in. |
| Annual | 56.1 °F | 78.9 °F | 38.44 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |