Millville, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 1.6 °C (low) to 15.6 °C (high). Annual precipitation averages 449.6 Millimeters. Millville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.1 °C | 0.5 °C | 49.78 mm |
| February | -7.3 °C | 3.1 °C | 38.86 mm |
| March | -2.3 °C | 9.7 °C | 52.32 mm |
| April | 1.1 °C | 14.4 °C | 51.56 mm |
| May | 5.2 °C | 19.7 °C | 54.36 mm |
| June | 8.9 °C | 25.9 °C | 30.48 mm |
| July | 13.2 °C | 31.6 °C | 17.53 mm |
| August | 12.4 °C | 30.8 °C | 16 mm |
| September | 7.3 °C | 24.9 °C | 30.99 mm |
| October | 1.3 °C | 16.8 °C | 41.91 mm |
| November | -3.6 °C | 8.1 °C | 32 mm |
| December | -8.4 °C | 1.2 °C | 33.78 mm |
| Annual | 1.6 °C | 15.6 °C | 449.57 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |