Plainview, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 54.2 °F (high). Annual precipitation averages 35.7 Inches. Plainview is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.3 °F | 23.0 °F | 1.01 in. |
| February | 9.7 °F | 27.6 °F | 1.07 in. |
| March | 22.2 °F | 40.1 °F | 1.92 in. |
| April | 34.5 °F | 54.8 °F | 3.59 in. |
| May | 46.7 °F | 67.4 °F | 4.56 in. |
| June | 57.2 °F | 77.3 °F | 5.37 in. |
| July | 60.8 °F | 80.7 °F | 4.31 in. |
| August | 58.4 °F | 78.5 °F | 4.62 in. |
| September | 50.2 °F | 71.9 °F | 3.82 in. |
| October | 37.6 °F | 58.3 °F | 2.45 in. |
| November | 25.4 °F | 42.0 °F | 1.78 in. |
| December | 13.7 °F | 28.6 °F | 1.24 in. |
| Annual | 35.2 °F | 54.2 °F | 35.74 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |