Gladwin, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35 °F (low) to 56.5 °F (high). Annual precipitation averages 33.2 Inches. Gladwin 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 | 12.8 °F | 29.0 °F | 1.96 in. |
| February | 12.5 °F | 31.8 °F | 1.45 in. |
| March | 20.6 °F | 42.0 °F | 1.85 in. |
| April | 31.8 °F | 55.2 °F | 3.2 in. |
| May | 43.6 °F | 68.3 °F | 3.75 in. |
| June | 53.4 °F | 77.8 °F | 3.63 in. |
| July | 57.1 °F | 81.7 °F | 3.18 in. |
| August | 55.4 °F | 79.8 °F | 3.72 in. |
| September | 47.4 °F | 72.8 °F | 2.9 in. |
| October | 37.2 °F | 59.4 °F | 3.2 in. |
| November | 28.3 °F | 45.4 °F | 2.44 in. |
| December | 20.2 °F | 34.4 °F | 1.94 in. |
| Annual | 35 °F | 56.5 °F | 33.22 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 |