Stanwood, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 13.2 °C (high). Annual precipitation averages 924.8 Millimeters. Stanwood is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.2 °C | -1.9 °C | 60.45 mm |
| February | -10.3 °C | -0.3 °C | 46.74 mm |
| March | -6 °C | 5.5 °C | 59.18 mm |
| April | 0.4 °C | 12.8 °C | 94.74 mm |
| May | 6.8 °C | 19.7 °C | 100.08 mm |
| June | 12.2 °C | 24.9 °C | 88.14 mm |
| July | 14.1 °C | 27.1 °C | 81.79 mm |
| August | 13.2 °C | 26.1 °C | 93.98 mm |
| September | 9.1 °C | 22.2 °C | 76.71 mm |
| October | 3 °C | 14.7 °C | 90.68 mm |
| November | -2 °C | 7.2 °C | 74.68 mm |
| December | -6.5 °C | 0.9 °C | 57.66 mm |
| Annual | 2 °C | 13.2 °C | 924.83 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |