Deweyville, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.6 °F (low) to 61 °F (high). Annual precipitation averages 17.6 Inches. 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 | 17.0 °F | 33.7 °F | 2.0 in. |
| February | 20.7 °F | 38.8 °F | 1.59 in. |
| March | 29.6 °F | 50.7 °F | 1.78 in. |
| April | 35.4 °F | 59.2 °F | 1.92 in. |
| May | 43.4 °F | 68.7 °F | 2.36 in. |
| June | 50.5 °F | 79.7 °F | 1.12 in. |
| July | 58.3 °F | 89.9 °F | 0.52 in. |
| August | 56.5 °F | 88.3 °F | 0.64 in. |
| September | 47.2 °F | 77.6 °F | 1.26 in. |
| October | 35.9 °F | 63.0 °F | 1.57 in. |
| November | 26.7 °F | 47.5 °F | 1.24 in. |
| December | 18.4 °F | 35.1 °F | 1.64 in. |
| Annual | 36.6 °F | 61 °F | 17.64 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |