Mapleton, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1 °C (low) to 10.1 °C (high). Annual precipitation averages 1005.1 Millimeters. Mapleton is located in USDA Plant Hardiness Zone 4a. 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 | -17.4 °C | -6.1 °C | 77.47 mm |
| February | -16.4 °C | -4.3 °C | 57.91 mm |
| March | -10.1 °C | 1.1 °C | 66.29 mm |
| April | -2.1 °C | 8.5 °C | 74.17 mm |
| May | 4.7 °C | 16.8 °C | 82.8 mm |
| June | 10 °C | 22.1 °C | 102.87 mm |
| July | 13.1 °C | 24.8 °C | 96.27 mm |
| August | 11.9 °C | 24.3 °C | 88.65 mm |
| September | 7.6 °C | 19.8 °C | 84.84 mm |
| October | 1.7 °C | 11.9 °C | 104.39 mm |
| November | -3.9 °C | 4.3 °C | 82.55 mm |
| December | -11.5 °C | -2.3 °C | 86.87 mm |
| Annual | -1 °C | 10.1 °C | 1005.08 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |