Rapid City, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.3 °C (low) to 12.5 °C (high). Annual precipitation averages 862.1 Millimeters. Rapid City is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | -2.2 °C | 55.37 mm |
| February | -10.2 °C | -1.2 °C | 42.16 mm |
| March | -6.3 °C | 4.1 °C | 47.75 mm |
| April | 0.1 °C | 11.3 °C | 77.47 mm |
| May | 6.2 °C | 18.6 °C | 79.76 mm |
| June | 11.9 °C | 23.9 °C | 81.53 mm |
| July | 14.3 °C | 26.3 °C | 74.93 mm |
| August | 13.6 °C | 25.6 °C | 80.26 mm |
| September | 9.9 °C | 21.8 °C | 88.9 mm |
| October | 4.2 °C | 14.1 °C | 100.84 mm |
| November | -0.7 °C | 6.9 °C | 73.15 mm |
| December | -5.5 °C | 0.8 °C | 59.94 mm |
| Annual | 2.3 °C | 12.5 °C | 862.06 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |