Dimmitt, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.5 °C (low) to 22.1 °C (high). Annual precipitation averages 497.3 Millimeters. Dimmitt is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 10.8 °C | 14.22 mm |
| February | -4.1 °C | 13.2 °C | 11.43 mm |
| March | -0.2 °C | 17.8 °C | 27.69 mm |
| April | 3.7 °C | 22.1 °C | 26.92 mm |
| May | 9.7 °C | 26.8 °C | 63.75 mm |
| June | 15.3 °C | 31.7 °C | 84.07 mm |
| July | 17.4 °C | 32.8 °C | 60.45 mm |
| August | 16.8 °C | 32.1 °C | 65.02 mm |
| September | 12.7 °C | 28.1 °C | 57.4 mm |
| October | 5.9 °C | 22.5 °C | 48.51 mm |
| November | -0.8 °C | 15.9 °C | 18.54 mm |
| December | -4.8 °C | 10.9 °C | 19.3 mm |
| Annual | 5.5 °C | 22.1 °C | 497.3 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |