Summit, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.4 °F (low) to 63.3 °F (high). Annual precipitation averages 12.4 Inches. Summit is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.8 °F | 41.9 °F | 0.94 in. |
| February | 20.2 °F | 45.5 °F | 1.16 in. |
| March | 26.1 °F | 53.8 °F | 1.35 in. |
| April | 31.3 °F | 59.8 °F | 1.11 in. |
| May | 39.6 °F | 69.3 °F | 1.08 in. |
| June | 48.2 °F | 80.9 °F | 0.42 in. |
| July | 56.0 °F | 86.6 °F | 0.98 in. |
| August | 54.5 °F | 84.7 °F | 1.13 in. |
| September | 45.7 °F | 77.2 °F | 0.98 in. |
| October | 34.2 °F | 65.1 °F | 1.27 in. |
| November | 24.0 °F | 52.6 °F | 0.96 in. |
| December | 16.6 °F | 41.6 °F | 1.05 in. |
| Annual | 34.4 °F | 63.3 °F | 12.43 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |