Mayfield, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.9 °F (low) to 63.6 °F (high). Annual precipitation averages 12.1 Inches. 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 | 14.4 °F | 38.3 °F | 0.96 in. |
| February | 19.6 °F | 43.7 °F | 0.91 in. |
| March | 26.4 °F | 53.9 °F | 1.15 in. |
| April | 31.2 °F | 61.0 °F | 1.26 in. |
| May | 38.6 °F | 70.7 °F | 1.33 in. |
| June | 46.4 °F | 82.8 °F | 0.8 in. |
| July | 53.7 °F | 90.2 °F | 0.63 in. |
| August | 52.1 °F | 88.1 °F | 0.82 in. |
| September | 43.2 °F | 79.4 °F | 1.05 in. |
| October | 32.4 °F | 65.8 °F | 1.21 in. |
| November | 22.5 °F | 50.9 °F | 0.93 in. |
| December | 14.7 °F | 38.3 °F | 1.09 in. |
| Annual | 32.9 °F | 63.6 °F | 12.14 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |