Swartz Creek, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38 °F (low) to 57.3 °F (high). Annual precipitation averages 33.2 Inches. Swartz Creek is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.6 °F | 30.3 °F | 2.19 in. |
| February | 16.0 °F | 33.1 °F | 1.69 in. |
| March | 24.0 °F | 43.3 °F | 1.97 in. |
| April | 35.1 °F | 56.3 °F | 3.27 in. |
| May | 46.5 °F | 68.5 °F | 3.7 in. |
| June | 56.3 °F | 78.0 °F | 3.35 in. |
| July | 59.9 °F | 81.9 °F | 3.49 in. |
| August | 58.6 °F | 79.9 °F | 3.3 in. |
| September | 51.0 °F | 73.5 °F | 2.9 in. |
| October | 40.3 °F | 60.4 °F | 2.9 in. |
| November | 30.9 °F | 47.0 °F | 2.36 in. |
| December | 22.3 °F | 35.5 °F | 2.03 in. |
| Annual | 38 °F | 57.3 °F | 33.15 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |