South Willard, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.3 °C (low) to 16.8 °C (high). Annual precipitation averages 484.9 Millimeters. South Willard is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.5 °C | 2.2 °C | 55.88 mm |
| February | -4.3 °C | 5.2 °C | 43.43 mm |
| March | 0 °C | 11.2 °C | 49.28 mm |
| April | 3.3 °C | 15.5 °C | 53.59 mm |
| May | 7.7 °C | 21 °C | 61.72 mm |
| June | 12 °C | 27.1 °C | 30.23 mm |
| July | 16.6 °C | 32.6 °C | 12.19 mm |
| August | 15.5 °C | 31.6 °C | 17.27 mm |
| September | 10.3 °C | 25.6 °C | 34.8 mm |
| October | 4.2 °C | 17.4 °C | 44.2 mm |
| November | -1.2 °C | 9.1 °C | 34.29 mm |
| December | -5.7 °C | 2.6 °C | 48.01 mm |
| Annual | 4.3 °C | 16.8 °C | 484.89 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |