Thatcher, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.8 °C (low) to 16.4 °C (high). Annual precipitation averages 385.3 Millimeters. 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 | -8.3 °C | 1.2 °C | 46.74 mm |
| February | -6.1 °C | 4.2 °C | 41.15 mm |
| March | -1.2 °C | 10.7 °C | 34.8 mm |
| April | 2.1 °C | 15.3 °C | 38.86 mm |
| May | 6.6 °C | 20.7 °C | 56.13 mm |
| June | 10.7 °C | 26.8 °C | 21.08 mm |
| July | 15.1 °C | 32.3 °C | 14.22 mm |
| August | 14.1 °C | 31.5 °C | 11.94 mm |
| September | 8.8 °C | 25.6 °C | 26.16 mm |
| October | 2.4 °C | 17.4 °C | 33.27 mm |
| November | -2.8 °C | 8.8 °C | 23.37 mm |
| December | -7.4 °C | 1.9 °C | 37.59 mm |
| Annual | 2.8 °C | 16.4 °C | 385.31 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |