Weidman, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 56.1 °F (high). Annual precipitation averages 34.6 Inches. Weidman 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 | 13.6 °F | 28.6 °F | 2.2 in. |
| February | 13.6 °F | 31.3 °F | 1.76 in. |
| March | 21.5 °F | 41.7 °F | 2.13 in. |
| April | 32.8 °F | 55.2 °F | 3.57 in. |
| May | 44.6 °F | 67.7 °F | 3.73 in. |
| June | 54.3 °F | 77.4 °F | 3.54 in. |
| July | 57.8 °F | 81.4 °F | 3.08 in. |
| August | 56.0 °F | 79.5 °F | 3.53 in. |
| September | 48.0 °F | 72.5 °F | 2.88 in. |
| October | 37.7 °F | 58.8 °F | 3.44 in. |
| November | 28.8 °F | 45.2 °F | 2.67 in. |
| December | 20.5 °F | 33.8 °F | 2.09 in. |
| Annual | 35.8 °F | 56.1 °F | 34.62 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 |