Ramona, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.3 °C (low) to 12.5 °C (high). Annual precipitation averages 669 Millimeters. Ramona 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 | -14.7 °C | -4.8 °C | 14.22 mm |
| February | -12.3 °C | -2.1 °C | 18.03 mm |
| March | -6.1 °C | 4.6 °C | 30.73 mm |
| April | 0.7 °C | 12.7 °C | 69.09 mm |
| May | 7.8 °C | 19.7 °C | 95 mm |
| June | 13.8 °C | 25.2 °C | 103.89 mm |
| July | 16.2 °C | 27.6 °C | 85.09 mm |
| August | 14.7 °C | 26.2 °C | 80.52 mm |
| September | 9.8 °C | 22.5 °C | 73.91 mm |
| October | 2.3 °C | 14.7 °C | 53.59 mm |
| November | -5 °C | 5.5 °C | 26.16 mm |
| December | -11.3 °C | -1.9 °C | 18.8 mm |
| Annual | 1.3 °C | 12.5 °C | 669.03 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |