Gladstone, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.3 °F (low) to 52.6 °F (high). Annual precipitation averages 32.1 Inches. Gladstone is located in USDA Plant Hardiness Zone 5a. 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 | 9.3 °F | 25.2 °F | 1.63 in. |
| February | 9.1 °F | 27.9 °F | 1.24 in. |
| March | 17.4 °F | 38.4 °F | 1.81 in. |
| April | 28.9 °F | 50.2 °F | 2.61 in. |
| May | 40.4 °F | 63.6 °F | 2.97 in. |
| June | 50.7 °F | 73.4 °F | 3.42 in. |
| July | 55.9 °F | 78.2 °F | 3.71 in. |
| August | 55.9 °F | 76.8 °F | 3.24 in. |
| September | 49.0 °F | 68.9 °F | 3.62 in. |
| October | 38.0 °F | 55.5 °F | 3.26 in. |
| November | 27.8 °F | 42.2 °F | 2.5 in. |
| December | 17.6 °F | 31.2 °F | 2.13 in. |
| Annual | 33.3 °F | 52.6 °F | 32.14 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |