Garden City, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2 °C (low) to 13.2 °C (high). Annual precipitation averages 349.8 Millimeters. Garden City is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.6 °C | -0.9 °C | 38.86 mm |
| February | -11.9 °C | 0.8 °C | 31.24 mm |
| March | -6.8 °C | 6 °C | 24.64 mm |
| April | -2.4 °C | 11.8 °C | 34.29 mm |
| May | 2 °C | 17.3 °C | 47.5 mm |
| June | 5.9 °C | 23.2 °C | 24.89 mm |
| July | 9.2 °C | 28.5 °C | 13.46 mm |
| August | 8.8 °C | 27.9 °C | 20.57 mm |
| September | 3.5 °C | 22.5 °C | 25.65 mm |
| October | -1.7 °C | 14.7 °C | 33.53 mm |
| November | -6.6 °C | 6.2 °C | 26.16 mm |
| December | -11.2 °C | 0.1 °C | 28.96 mm |
| Annual | -2 °C | 13.2 °C | 349.75 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |