Herreid, South Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 32.4 °F (low) to 55.3 °F (high). Annual precipitation averages 18.7 Inches. Herreid is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.6 °F | 23.0 °F | 0.38 in. |
| February | 7.7 °F | 27.9 °F | 0.45 in. |
| March | 19.1 °F | 40.4 °F | 0.75 in. |
| April | 31.2 °F | 56.1 °F | 1.36 in. |
| May | 43.5 °F | 68.2 °F | 2.75 in. |
| June | 54.3 °F | 77.8 °F | 3.42 in. |
| July | 59.6 °F | 84.4 °F | 3.11 in. |
| August | 57.2 °F | 83.6 °F | 2.14 in. |
| September | 47.6 °F | 74.4 °F | 1.69 in. |
| October | 34.3 °F | 58.2 °F | 1.68 in. |
| November | 20.7 °F | 41.4 °F | 0.51 in. |
| December | 9.6 °F | 28.1 °F | 0.43 in. |
| Annual | 32.4 °F | 55.3 °F | 18.67 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |