Rule, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.3 °F (low) to 76.9 °F (high). Annual precipitation averages 25.1 Inches. Rule is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.2 °F | 56.2 °F | 1.06 in. |
| February | 32.3 °F | 60.4 °F | 1.32 in. |
| March | 40.4 °F | 69.0 °F | 1.76 in. |
| April | 48.4 °F | 77.7 °F | 2.09 in. |
| May | 58.9 °F | 85.4 °F | 3.23 in. |
| June | 67.8 °F | 92.5 °F | 3.58 in. |
| July | 71.5 °F | 96.4 °F | 1.8 in. |
| August | 70.3 °F | 95.7 °F | 2.24 in. |
| September | 62.6 °F | 87.8 °F | 2.93 in. |
| October | 51.2 °F | 78.2 °F | 2.24 in. |
| November | 39.4 °F | 66.3 °F | 1.56 in. |
| December | 31.2 °F | 57.4 °F | 1.25 in. |
| Annual | 50.3 °F | 76.9 °F | 25.06 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |