Monahans, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 50.2 °F (low) to 80.6 °F (high). Annual precipitation averages 12.2 Inches. Monahans 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.9 °F | 60.4 °F | 0.61 in. |
| February | 33.5 °F | 66.2 °F | 0.58 in. |
| March | 40.5 °F | 74.0 °F | 0.54 in. |
| April | 48.5 °F | 82.8 °F | 0.53 in. |
| May | 58.6 °F | 90.6 °F | 1.23 in. |
| June | 68.2 °F | 97.5 °F | 1.15 in. |
| July | 70.6 °F | 97.6 °F | 1.31 in. |
| August | 69.6 °F | 96.8 °F | 1.53 in. |
| September | 62.7 °F | 89.7 °F | 2.2 in. |
| October | 50.9 °F | 81.4 °F | 1.29 in. |
| November | 38.3 °F | 69.4 °F | 0.59 in. |
| December | 30.9 °F | 61.1 °F | 0.68 in. |
| Annual | 50.2 °F | 80.6 °F | 12.24 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |