Petoskey, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 52.7 °F (high). Annual precipitation averages 34.6 Inches. Petoskey is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.2 °F | 27.3 °F | 2.46 in. |
| February | 12.7 °F | 28.7 °F | 1.57 in. |
| March | 19.6 °F | 37.5 °F | 1.85 in. |
| April | 31.3 °F | 49.4 °F | 2.88 in. |
| May | 42.6 °F | 63.0 °F | 3.0 in. |
| June | 52.8 °F | 71.9 °F | 2.89 in. |
| July | 58.2 °F | 76.3 °F | 2.66 in. |
| August | 57.6 °F | 75.9 °F | 3.27 in. |
| September | 50.7 °F | 69.4 °F | 3.66 in. |
| October | 40.0 °F | 56.2 °F | 4.36 in. |
| November | 30.9 °F | 43.6 °F | 3.2 in. |
| December | 22.3 °F | 33.4 °F | 2.79 in. |
| Annual | 36.1 °F | 52.7 °F | 34.59 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |