Alden, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.4 °F (low) to 54.7 °F (high). Annual precipitation averages 33.7 Inches. Alden is located in USDA Plant Hardiness Zone 6a. 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 | 15.3 °F | 28.1 °F | 2.17 in. |
| February | 14.1 °F | 30.1 °F | 1.61 in. |
| March | 20.8 °F | 39.7 °F | 1.85 in. |
| April | 32.2 °F | 52.6 °F | 3.02 in. |
| May | 43.0 °F | 65.5 °F | 3.12 in. |
| June | 53.2 °F | 75.2 °F | 3.2 in. |
| July | 58.0 °F | 79.6 °F | 2.9 in. |
| August | 57.0 °F | 78.2 °F | 3.18 in. |
| September | 50.0 °F | 71.4 °F | 3.52 in. |
| October | 39.7 °F | 57.6 °F | 3.98 in. |
| November | 30.9 °F | 44.6 °F | 2.83 in. |
| December | 22.5 °F | 33.5 °F | 2.36 in. |
| Annual | 36.4 °F | 54.7 °F | 33.74 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 6a : -10°F to -5°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 |