Millcreek, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.5 °F (low) to 64.7 °F (high). Annual precipitation averages 15.5 Inches. Millcreek is located in USDA Plant Hardiness Zone 7b. 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 | 22.2 °F | 39.1 °F | 1.34 in. |
| February | 26.0 °F | 44.4 °F | 1.33 in. |
| March | 33.8 °F | 54.8 °F | 1.66 in. |
| April | 38.4 °F | 61.8 °F | 2.08 in. |
| May | 47.3 °F | 71.9 °F | 2.01 in. |
| June | 55.5 °F | 83.1 °F | 1.03 in. |
| July | 64.7 °F | 92.9 °F | 0.64 in. |
| August | 62.9 °F | 91.1 °F | 0.65 in. |
| September | 53.0 °F | 80.4 °F | 0.89 in. |
| October | 41.1 °F | 65.9 °F | 1.31 in. |
| November | 30.5 °F | 50.9 °F | 1.27 in. |
| December | 23.0 °F | 39.7 °F | 1.33 in. |
| Annual | 41.5 °F | 64.7 °F | 15.54 in. |
| 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |