Maple Plain, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 12.2 °C (high). Annual precipitation averages 812 Millimeters. Maple Plain is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.8 °C | -5.4 °C | 20.57 mm |
| February | -12.9 °C | -2.8 °C | 22.1 mm |
| March | -6 °C | 4.2 °C | 37.59 mm |
| April | 1.7 °C | 12.5 °C | 71.37 mm |
| May | 8.9 °C | 19.8 °C | 109.22 mm |
| June | 14.9 °C | 25.2 °C | 121.92 mm |
| July | 17.2 °C | 27.7 °C | 102.11 mm |
| August | 16.1 °C | 26.4 °C | 108.2 mm |
| September | 11.4 °C | 22.3 °C | 86.36 mm |
| October | 4.2 °C | 14.2 °C | 63.25 mm |
| November | -3.1 °C | 5.2 °C | 37.08 mm |
| December | -10.7 °C | -2.6 °C | 32.26 mm |
| Annual | 2.2 °C | 12.2 °C | 812.03 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |