Rankin, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 11.2 °C (low) to 26.4 °C (high). Annual precipitation averages 377.7 Millimeters. Rankin is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.2 °C | 15.4 °C | 19.05 mm |
| February | 2.4 °C | 18.4 °C | 19.81 mm |
| March | 6.6 °C | 22.8 °C | 16.26 mm |
| April | 10.8 °C | 27.7 °C | 19.05 mm |
| May | 16.3 °C | 31.9 °C | 42.67 mm |
| June | 20.6 °C | 35.1 °C | 37.59 mm |
| July | 21.7 °C | 35.8 °C | 32.26 mm |
| August | 21.2 °C | 35.3 °C | 53.09 mm |
| September | 17.4 °C | 31.7 °C | 61.21 mm |
| October | 11.8 °C | 27 °C | 38.86 mm |
| November | 5.1 °C | 20.3 °C | 21.34 mm |
| December | 0.8 °C | 15.9 °C | 16.51 mm |
| Annual | 11.2 °C | 26.4 °C | 377.7 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |