Thompson Springs, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.8 °C (low) to 19 °C (high). Annual precipitation averages 265.9 Millimeters. Thompson Springs 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 | -7.8 °C | 3.8 °C | 22.35 mm |
| February | -4 °C | 7.8 °C | 20.57 mm |
| March | -0.1 °C | 14.2 °C | 24.13 mm |
| April | 3.2 °C | 18.4 °C | 17.78 mm |
| May | 8.6 °C | 24 °C | 26.92 mm |
| June | 14.2 °C | 31 °C | 9.65 mm |
| July | 18.1 °C | 34.2 °C | 17.27 mm |
| August | 16.6 °C | 32.7 °C | 29.46 mm |
| September | 12 °C | 27.4 °C | 36.07 mm |
| October | 4.9 °C | 19.5 °C | 29.21 mm |
| November | -1.6 °C | 11.3 °C | 15.75 mm |
| December | -7 °C | 4.2 °C | 16.76 mm |
| Annual | 4.8 °C | 19 °C | 265.92 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |