Mapleton, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.2 °C (low) to 11 °C (high). Annual precipitation averages 606.1 Millimeters. Mapleton 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.2 °C | -8.4 °C | 15.49 mm |
| February | -15.8 °C | -5.4 °C | 15.24 mm |
| March | -8.3 °C | 1.7 °C | 25.65 mm |
| April | -0.2 °C | 11.8 °C | 32.77 mm |
| May | 7 °C | 19.9 °C | 78.74 mm |
| June | 13.3 °C | 24.9 °C | 109.73 mm |
| July | 15.3 °C | 27.2 °C | 90.93 mm |
| August | 13.7 °C | 26.8 °C | 68.33 mm |
| September | 8.6 °C | 22.1 °C | 70.87 mm |
| October | 1.7 °C | 13.4 °C | 58.42 mm |
| November | -6.2 °C | 3.3 °C | 20.32 mm |
| December | -13.6 °C | -4.8 °C | 19.56 mm |
| Annual | -0.2 °C | 11 °C | 606.05 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |