Washington Terrace, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 4.3 °C (low) to 16.6 °C (high). Annual precipitation averages 512.1 Millimeters. Washington Terrace 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.4 °C | 2.4 °C | 55.63 mm |
| February | -4.4 °C | 5.3 °C | 45.97 mm |
| March | -0.2 °C | 11.1 °C | 51.82 mm |
| April | 3 °C | 15.1 °C | 62.23 mm |
| May | 7.6 °C | 20.6 °C | 62.23 mm |
| June | 11.9 °C | 26.7 °C | 32.26 mm |
| July | 16.6 °C | 32.2 °C | 12.45 mm |
| August | 15.8 °C | 31.2 °C | 19.05 mm |
| September | 10.5 °C | 25.3 °C | 35.31 mm |
| October | 4.1 °C | 17.2 °C | 47.75 mm |
| November | -1.4 °C | 9.1 °C | 40.39 mm |
| December | -5.9 °C | 2.7 °C | 46.99 mm |
| Annual | 4.3 °C | 16.6 °C | 512.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Dsa - Humid Continental Climate - Dry Warm Summer |