Sterling, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 17.1 °C (high). Annual precipitation averages 305.6 Millimeters. Sterling is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.8 °C | 2.9 °C | 24.13 mm |
| February | -6.8 °C | 6 °C | 22.35 mm |
| March | -3.1 °C | 11.8 °C | 28.96 mm |
| April | -0.4 °C | 15.7 °C | 32 mm |
| May | 3.7 °C | 21 °C | 33.78 mm |
| June | 8 °C | 27.8 °C | 19.81 mm |
| July | 12 °C | 31.8 °C | 15.49 mm |
| August | 11.1 °C | 30.7 °C | 20.57 mm |
| September | 6.3 °C | 25.9 °C | 26.67 mm |
| October | 0.2 °C | 18.4 °C | 30.48 mm |
| November | -5.2 °C | 10.3 °C | 23.62 mm |
| December | -9.7 °C | 3 °C | 27.69 mm |
| Annual | 0.5 °C | 17.1 °C | 305.55 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 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 | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |