Worthing, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.6 °F (low) to 57.1 °F (high). Annual precipitation averages 27.6 Inches. Worthing is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.0 °F | 25.8 °F | 0.59 in. |
| February | 11.5 °F | 30.8 °F | 0.77 in. |
| March | 23.0 °F | 43.4 °F | 1.4 in. |
| April | 34.5 °F | 58.2 °F | 2.89 in. |
| May | 47.2 °F | 70.3 °F | 3.96 in. |
| June | 58.5 °F | 80.4 °F | 4.36 in. |
| July | 62.0 °F | 84.0 °F | 3.3 in. |
| August | 59.5 °F | 81.5 °F | 3.19 in. |
| September | 50.4 °F | 74.9 °F | 2.69 in. |
| October | 37.1 °F | 61.1 °F | 2.38 in. |
| November | 23.8 °F | 44.3 °F | 1.2 in. |
| December | 12.6 °F | 30.3 °F | 0.84 in. |
| Annual | 35.6 °F | 57.1 °F | 27.57 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |