Pierz, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.9 °F (low) to 52.7 °F (high). Annual precipitation averages 29.3 Inches. Pierz is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °F | 20.2 °F | 0.7 in. |
| February | 4.2 °F | 25.6 °F | 0.78 in. |
| March | 17.5 °F | 38.5 °F | 1.41 in. |
| April | 30.9 °F | 53.3 °F | 2.47 in. |
| May | 44.1 °F | 66.9 °F | 3.56 in. |
| June | 54.6 °F | 76.3 °F | 4.49 in. |
| July | 59.1 °F | 81.3 °F | 4.14 in. |
| August | 56.3 °F | 79.0 °F | 3.78 in. |
| September | 48.0 °F | 70.8 °F | 2.91 in. |
| October | 35.5 °F | 55.9 °F | 2.8 in. |
| November | 22.4 °F | 39.1 °F | 1.31 in. |
| December | 9.4 °F | 25.6 °F | 0.96 in. |
| Annual | 31.9 °F | 52.7 °F | 29.31 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |