Deckerville, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.3 °F (low) to 55.7 °F (high). Annual precipitation averages 32.3 Inches. Deckerville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.9 °F | 28.6 °F | 2.16 in. |
| February | 14.9 °F | 31.2 °F | 1.63 in. |
| March | 23.2 °F | 40.8 °F | 1.88 in. |
| April | 33.5 °F | 53.7 °F | 3.03 in. |
| May | 45.1 °F | 66.3 °F | 3.39 in. |
| June | 54.6 °F | 76.4 °F | 3.3 in. |
| July | 59.1 °F | 80.5 °F | 3.12 in. |
| August | 58.0 °F | 78.8 °F | 3.12 in. |
| September | 51.3 °F | 72.8 °F | 3.23 in. |
| October | 40.8 °F | 59.4 °F | 2.94 in. |
| November | 30.6 °F | 46.0 °F | 2.47 in. |
| December | 21.9 °F | 34.4 °F | 2.05 in. |
| Annual | 37.3 °F | 55.7 °F | 32.32 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 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 |