Junction, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.5 °C (low) to 17.9 °C (high). Annual precipitation averages 232.7 Millimeters. 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 | -9.9 °C | 5.3 °C | 14.99 mm |
| February | -7.6 °C | 7.7 °C | 16 mm |
| March | -4.5 °C | 12.4 °C | 19.05 mm |
| April | -1.8 °C | 16.3 °C | 16.76 mm |
| May | 2.4 °C | 21.4 °C | 21.34 mm |
| June | 6.6 °C | 27.9 °C | 11.43 mm |
| July | 10.8 °C | 31.3 °C | 23.37 mm |
| August | 10 °C | 30.1 °C | 29.21 mm |
| September | 5 °C | 26 °C | 25.91 mm |
| October | -0.8 °C | 19.3 °C | 25.91 mm |
| November | -6.2 °C | 11.6 °C | 12.19 mm |
| December | -10.2 °C | 5.3 °C | 16.51 mm |
| Annual | -0.5 °C | 17.9 °C | 232.67 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |