Plainview, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.8 °C (low) to 12.3 °C (high). Annual precipitation averages 907.8 Millimeters. 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 | -14.3 °C | -5 °C | 25.65 mm |
| February | -12.4 °C | -2.4 °C | 27.18 mm |
| March | -5.4 °C | 4.5 °C | 48.77 mm |
| April | 1.4 °C | 12.7 °C | 91.19 mm |
| May | 8.2 °C | 19.7 °C | 115.82 mm |
| June | 14 °C | 25.2 °C | 136.4 mm |
| July | 16 °C | 27.1 °C | 109.47 mm |
| August | 14.7 °C | 25.8 °C | 117.35 mm |
| September | 10.1 °C | 22.2 °C | 97.03 mm |
| October | 3.1 °C | 14.6 °C | 62.23 mm |
| November | -3.7 °C | 5.6 °C | 45.21 mm |
| December | -10.2 °C | -1.9 °C | 31.5 mm |
| Annual | 1.8 °C | 12.3 °C | 907.8 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |