Mayfield, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 17.6 °C (high). Annual precipitation averages 308.3 Millimeters. Mayfield is located in USDA Plant Hardiness Zone 6a. 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 | -9.8 °C | 3.5 °C | 24.38 mm |
| February | -6.9 °C | 6.5 °C | 23.11 mm |
| March | -3.1 °C | 12.2 °C | 29.21 mm |
| April | -0.4 °C | 16.1 °C | 32 mm |
| May | 3.7 °C | 21.5 °C | 33.78 mm |
| June | 8 °C | 28.2 °C | 20.32 mm |
| July | 12.1 °C | 32.3 °C | 16 mm |
| August | 11.2 °C | 31.2 °C | 20.83 mm |
| September | 6.2 °C | 26.3 °C | 26.67 mm |
| October | 0.2 °C | 18.8 °C | 30.73 mm |
| November | -5.3 °C | 10.5 °C | 23.62 mm |
| December | -9.6 °C | 3.5 °C | 27.69 mm |
| Annual | 0.5 °C | 17.6 °C | 308.34 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |