Junction, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.1 °F (low) to 64.2 °F (high). Annual precipitation averages 9.2 Inches. Junction is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.2 °F | 41.6 °F | 0.59 in. |
| February | 18.3 °F | 45.8 °F | 0.63 in. |
| March | 23.9 °F | 54.3 °F | 0.75 in. |
| April | 28.8 °F | 61.3 °F | 0.66 in. |
| May | 36.3 °F | 70.6 °F | 0.84 in. |
| June | 43.9 °F | 82.3 °F | 0.45 in. |
| July | 51.4 °F | 88.3 °F | 0.92 in. |
| August | 50.0 °F | 86.1 °F | 1.15 in. |
| September | 41.0 °F | 78.8 °F | 1.02 in. |
| October | 30.6 °F | 66.7 °F | 1.02 in. |
| November | 20.9 °F | 52.8 °F | 0.48 in. |
| December | 13.6 °F | 41.5 °F | 0.65 in. |
| Annual | 31.1 °F | 64.2 °F | 9.16 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |