Forest Hills, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.1 °F (low) to 57.2 °F (high). Annual precipitation averages 38.5 Inches. Forest Hills is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 30.4 °F | 2.8 in. |
| February | 17.9 °F | 32.6 °F | 2.16 in. |
| March | 25.2 °F | 43.0 °F | 2.38 in. |
| April | 36.1 °F | 56.6 °F | 3.81 in. |
| May | 47.0 °F | 68.0 °F | 4.13 in. |
| June | 57.0 °F | 77.9 °F | 3.76 in. |
| July | 60.9 °F | 81.8 °F | 3.43 in. |
| August | 59.7 °F | 80.2 °F | 3.45 in. |
| September | 51.8 °F | 73.4 °F | 3.25 in. |
| October | 41.1 °F | 60.5 °F | 3.66 in. |
| November | 31.7 °F | 46.7 °F | 3.06 in. |
| December | 23.8 °F | 35.6 °F | 2.58 in. |
| Annual | 39.1 °F | 57.2 °F | 38.47 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |