Imperial, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 50.2 °F (low) to 81.9 °F (high). Annual precipitation averages 11.6 Inches. Imperial is located in USDA Plant Hardiness Zone 8a. 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 | 29.0 °F | 61.4 °F | 0.56 in. |
| February | 33.4 °F | 67.2 °F | 0.52 in. |
| March | 40.6 °F | 75.1 °F | 0.52 in. |
| April | 48.7 °F | 84.2 °F | 0.61 in. |
| May | 59.1 °F | 92.0 °F | 1.32 in. |
| June | 69.0 °F | 98.7 °F | 1.07 in. |
| July | 71.3 °F | 98.9 °F | 1.38 in. |
| August | 70.3 °F | 98.2 °F | 1.48 in. |
| September | 62.7 °F | 91.0 °F | 1.69 in. |
| October | 51.1 °F | 83.0 °F | 0.96 in. |
| November | 37.7 °F | 70.7 °F | 0.85 in. |
| December | 30.0 °F | 62.2 °F | 0.64 in. |
| Annual | 50.2 °F | 81.9 °F | 11.6 in. |
| 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |