West Valley City, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.3 °C (low) to 17.9 °C (high). Annual precipitation averages 425.5 Millimeters. West Valley City 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 | -5.5 °C | 3.8 °C | 36.07 mm |
| February | -3.3 °C | 6.7 °C | 35.31 mm |
| March | 0.9 °C | 12.5 °C | 41.15 mm |
| April | 3.7 °C | 16.1 °C | 56.64 mm |
| May | 8.5 °C | 21.8 °C | 50.55 mm |
| June | 13.1 °C | 28.1 °C | 25.4 mm |
| July | 18.3 °C | 33.5 °C | 20.57 mm |
| August | 17.2 °C | 32.7 °C | 22.35 mm |
| September | 11.7 °C | 26.6 °C | 29.21 mm |
| October | 5.1 °C | 18.4 °C | 35.81 mm |
| November | -0.8 °C | 10.3 °C | 38.35 mm |
| December | -5.1 °C | 4.1 °C | 34.04 mm |
| Annual | 5.3 °C | 17.9 °C | 425.45 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |