Kearns, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.3 °C (low) to 17.7 °C (high). Annual precipitation averages 435.6 Millimeters. Kearns is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.2 °C | 3.9 °C | 37.85 mm |
| February | -3.2 °C | 6.7 °C | 39.12 mm |
| March | 0.8 °C | 12.3 °C | 50.04 mm |
| April | 3.5 °C | 15.8 °C | 56.39 mm |
| May | 8.3 °C | 21.4 °C | 50.8 mm |
| June | 12.9 °C | 27.8 °C | 23.88 mm |
| July | 18.1 °C | 33.2 °C | 21.84 mm |
| August | 17.1 °C | 32.3 °C | 21.08 mm |
| September | 11.7 °C | 26.3 °C | 30.23 mm |
| October | 5.2 °C | 18.2 °C | 33.78 mm |
| November | -0.5 °C | 10.1 °C | 35.05 mm |
| December | -4.9 °C | 4.1 °C | 35.56 mm |
| Annual | 5.3 °C | 17.7 °C | 435.62 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |