Pierson, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 55.9 °F (high). Annual precipitation averages 36.8 Inches. Pierson 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 | 14.8 °F | 28.7 °F | 2.41 in. |
| February | 14.5 °F | 31.6 °F | 1.92 in. |
| March | 22.2 °F | 41.9 °F | 2.32 in. |
| April | 33.7 °F | 55.2 °F | 3.73 in. |
| May | 45.1 °F | 67.2 °F | 4.04 in. |
| June | 54.6 °F | 76.7 °F | 3.6 in. |
| July | 58.2 °F | 80.6 °F | 3.23 in. |
| August | 56.7 °F | 79.0 °F | 3.53 in. |
| September | 49.3 °F | 72.1 °F | 3.03 in. |
| October | 38.3 °F | 58.8 °F | 3.59 in. |
| November | 29.2 °F | 45.1 °F | 3.0 in. |
| December | 21.2 °F | 33.8 °F | 2.35 in. |
| Annual | 36.5 °F | 55.9 °F | 36.75 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 |