Rapid River, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.1 °C (low) to 11.6 °C (high). Annual precipitation averages 832.1 Millimeters. Rapid River is located in USDA Plant Hardiness Zone 5a. 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 | -13.5 °C | -3.6 °C | 43.18 mm |
| February | -13.6 °C | -2.1 °C | 33.27 mm |
| March | -9.1 °C | 3.6 °C | 46.23 mm |
| April | -2.6 °C | 10.2 °C | 67.82 mm |
| May | 4.3 °C | 17.7 °C | 78.49 mm |
| June | 9.9 °C | 23.4 °C | 88.14 mm |
| July | 12.7 °C | 26 °C | 93.98 mm |
| August | 12.3 °C | 25.2 °C | 82.55 mm |
| September | 8.4 °C | 20.8 °C | 93.47 mm |
| October | 2.4 °C | 13.2 °C | 85.6 mm |
| November | -3.1 °C | 5.7 °C | 64.77 mm |
| December | -9 °C | -0.5 °C | 54.61 mm |
| Annual | -0.1 °C | 11.6 °C | 832.11 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 5a : -28.9°C to -26.1°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 |