Alpine, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.2 °F (low) to 63.6 °F (high). Annual precipitation averages 19.5 Inches. Alpine 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.2 °F | 39.2 °F | 2.15 in. |
| February | 24.7 °F | 43.6 °F | 1.8 in. |
| March | 31.6 °F | 53.4 °F | 1.94 in. |
| April | 36.6 °F | 61.0 °F | 2.4 in. |
| May | 44.4 °F | 71.0 °F | 2.31 in. |
| June | 51.9 °F | 82.5 °F | 1.02 in. |
| July | 60.1 °F | 91.0 °F | 0.62 in. |
| August | 58.8 °F | 89.1 °F | 0.86 in. |
| September | 50.2 °F | 79.0 °F | 1.25 in. |
| October | 39.0 °F | 64.4 °F | 1.69 in. |
| November | 29.8 °F | 50.1 °F | 1.47 in. |
| December | 22.0 °F | 39.1 °F | 1.97 in. |
| Annual | 39.2 °F | 63.6 °F | 19.48 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |