Monahans, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 10.1 °C (low) to 27 °C (high). Annual precipitation averages 310.9 Millimeters. 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 | -1.2 °C | 15.8 °C | 15.49 mm |
| February | 0.8 °C | 19 °C | 14.73 mm |
| March | 4.7 °C | 23.3 °C | 13.72 mm |
| April | 9.2 °C | 28.2 °C | 13.46 mm |
| May | 14.8 °C | 32.6 °C | 31.24 mm |
| June | 20.1 °C | 36.4 °C | 29.21 mm |
| July | 21.4 °C | 36.4 °C | 33.27 mm |
| August | 20.9 °C | 36 °C | 38.86 mm |
| September | 17.1 °C | 32.1 °C | 55.88 mm |
| October | 10.5 °C | 27.4 °C | 32.77 mm |
| November | 3.5 °C | 20.8 °C | 14.99 mm |
| December | -0.6 °C | 16.2 °C | 17.27 mm |
| Annual | 10.1 °C | 27 °C | 310.89 mm |
| 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 : -12.2°C to -9.4°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 |