Lehi, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.2 °C (low) to 18 °C (high). Annual precipitation averages 354.6 Millimeters. Lehi is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.2 °C | 3.7 °C | 34.29 mm |
| February | -3.9 °C | 6.9 °C | 29.97 mm |
| March | 0.2 °C | 12.7 °C | 32.51 mm |
| April | 2.9 °C | 16.8 °C | 41.15 mm |
| May | 7.3 °C | 22.2 °C | 43.18 mm |
| June | 11.4 °C | 28.8 °C | 20.83 mm |
| July | 16.1 °C | 33.3 °C | 12.7 mm |
| August | 15.5 °C | 32.3 °C | 19.56 mm |
| September | 10.3 °C | 26.7 °C | 26.16 mm |
| October | 3.9 °C | 18.7 °C | 33.78 mm |
| November | -1.2 °C | 10.2 °C | 27.43 mm |
| December | -5.4 °C | 3.8 °C | 33.02 mm |
| Annual | 4.2 °C | 18 °C | 354.58 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |