Fulton, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.9 °F (low) to 49.2 °F (high). Annual precipitation averages 32.3 Inches. Fulton 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.0 °F | 22.3 °F | 2.64 in. |
| February | 10.8 °F | 25.0 °F | 1.61 in. |
| March | 16.2 °F | 34.7 °F | 1.67 in. |
| April | 28.8 °F | 45.3 °F | 2.29 in. |
| May | 40.2 °F | 59.8 °F | 2.93 in. |
| June | 49.7 °F | 70.1 °F | 2.95 in. |
| July | 55.7 °F | 74.9 °F | 3.1 in. |
| August | 55.1 °F | 73.8 °F | 2.75 in. |
| September | 48.3 °F | 66.2 °F | 3.37 in. |
| October | 37.3 °F | 52.1 °F | 3.46 in. |
| November | 26.6 °F | 38.2 °F | 2.68 in. |
| December | 17.3 °F | 27.9 °F | 2.8 in. |
| Annual | 32.9 °F | 49.2 °F | 32.25 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 |