Deweyville, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.6 °C (low) to 16.1 °C (high). Annual precipitation averages 448.1 Millimeters. Deweyville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 0.9 °C | 50.8 mm |
| February | -6.3 °C | 3.8 °C | 40.39 mm |
| March | -1.3 °C | 10.4 °C | 45.21 mm |
| April | 1.9 °C | 15.1 °C | 48.77 mm |
| May | 6.3 °C | 20.4 °C | 59.94 mm |
| June | 10.3 °C | 26.5 °C | 28.45 mm |
| July | 14.6 °C | 32.2 °C | 13.21 mm |
| August | 13.6 °C | 31.3 °C | 16.26 mm |
| September | 8.4 °C | 25.3 °C | 32 mm |
| October | 2.2 °C | 17.2 °C | 39.88 mm |
| November | -2.9 °C | 8.6 °C | 31.5 mm |
| December | -7.6 °C | 1.7 °C | 41.66 mm |
| Annual | 2.6 °C | 16.1 °C | 448.07 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |