Highmore, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 33.6 °F (low) to 57.2 °F (high). Annual precipitation averages 22 Inches. Highmore 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 | 6.1 °F | 26.1 °F | 0.45 in. |
| February | 10.3 °F | 30.7 °F | 0.66 in. |
| March | 20.8 °F | 43.6 °F | 0.95 in. |
| April | 31.7 °F | 57.8 °F | 2.26 in. |
| May | 43.9 °F | 68.9 °F | 3.59 in. |
| June | 54.8 °F | 78.8 °F | 3.91 in. |
| July | 60.0 °F | 85.7 °F | 2.97 in. |
| August | 58.3 °F | 84.4 °F | 2.23 in. |
| September | 49.1 °F | 76.3 °F | 2.06 in. |
| October | 35.3 °F | 60.2 °F | 1.9 in. |
| November | 22.0 °F | 43.6 °F | 0.56 in. |
| December | 11.2 °F | 30.2 °F | 0.45 in. |
| Annual | 33.6 °F | 57.2 °F | 21.99 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 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |