South Rockwood, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.3 °C (low) to 14.9 °C (high). Annual precipitation averages 898.1 Millimeters. South Rockwood is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.2 °C | 0.3 °C | 61.72 mm |
| February | -6.6 °C | 1.8 °C | 53.59 mm |
| March | -2.4 °C | 7.1 °C | 65.53 mm |
| April | 3.6 °C | 14 °C | 82.3 mm |
| May | 9.9 °C | 20.5 °C | 96.01 mm |
| June | 15.6 °C | 26.2 °C | 86.36 mm |
| July | 17.7 °C | 28.4 °C | 84.84 mm |
| August | 16.9 °C | 27.4 °C | 86.11 mm |
| September | 13 °C | 23.8 °C | 81.28 mm |
| October | 6.4 °C | 16.7 °C | 70.1 mm |
| November | 0.9 °C | 9.2 °C | 69.34 mm |
| December | -3.7 °C | 3.1 °C | 60.96 mm |
| Annual | 5.3 °C | 14.9 °C | 898.14 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |