West Haven, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 17.1 °C (high). Annual precipitation averages 430 Millimeters. West Haven 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 2.6 °C | 47.24 mm |
| February | -3.6 °C | 5.7 °C | 39.12 mm |
| March | 0.8 °C | 11.7 °C | 43.69 mm |
| April | 4 °C | 15.8 °C | 48.51 mm |
| May | 8.7 °C | 21.4 °C | 55.63 mm |
| June | 13.1 °C | 27.5 °C | 24.89 mm |
| July | 17.7 °C | 32.9 °C | 10.92 mm |
| August | 16.7 °C | 31.9 °C | 17.02 mm |
| September | 11.3 °C | 25.9 °C | 28.96 mm |
| October | 4.8 °C | 17.7 °C | 42.42 mm |
| November | -0.8 °C | 9.4 °C | 30.99 mm |
| December | -5.2 °C | 2.9 °C | 40.64 mm |
| Annual | 5.1 °C | 17.1 °C | 430.03 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |