Rockwood, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.7 °F (low) to 58.8 °F (high). Annual precipitation averages 35.5 Inches. 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 | 19.1 °F | 32.5 °F | 2.44 in. |
| February | 20.3 °F | 35.2 °F | 2.13 in. |
| March | 27.7 °F | 44.8 °F | 2.6 in. |
| April | 38.5 °F | 57.2 °F | 3.25 in. |
| May | 50.0 °F | 68.9 °F | 3.79 in. |
| June | 60.1 °F | 79.1 °F | 3.37 in. |
| July | 64.0 °F | 83.0 °F | 3.35 in. |
| August | 62.6 °F | 81.4 °F | 3.41 in. |
| September | 55.4 °F | 74.9 °F | 3.21 in. |
| October | 43.8 °F | 61.9 °F | 2.77 in. |
| November | 33.7 °F | 48.5 °F | 2.73 in. |
| December | 25.4 °F | 37.6 °F | 2.41 in. |
| Annual | 41.7 °F | 58.8 °F | 35.46 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |