Thatcher, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.1 °F (low) to 61.5 °F (high). Annual precipitation averages 15.2 Inches. Thatcher is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.0 °F | 34.1 °F | 1.84 in. |
| February | 21.0 °F | 39.6 °F | 1.62 in. |
| March | 29.9 °F | 51.2 °F | 1.37 in. |
| April | 35.7 °F | 59.6 °F | 1.53 in. |
| May | 43.9 °F | 69.2 °F | 2.21 in. |
| June | 51.2 °F | 80.2 °F | 0.83 in. |
| July | 59.1 °F | 90.2 °F | 0.56 in. |
| August | 57.3 °F | 88.7 °F | 0.47 in. |
| September | 47.9 °F | 78.0 °F | 1.03 in. |
| October | 36.4 °F | 63.3 °F | 1.31 in. |
| November | 26.9 °F | 47.8 °F | 0.92 in. |
| December | 18.7 °F | 35.5 °F | 1.48 in. |
| Annual | 37.1 °F | 61.5 °F | 15.17 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |