Appleton, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.4 °F (low) to 53.9 °F (high). Annual precipitation averages 50.3 Inches. Appleton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.4 °F | 28.5 °F | 3.96 in. |
| February | 13.4 °F | 31.3 °F | 3.49 in. |
| March | 23.2 °F | 39.3 °F | 4.14 in. |
| April | 34.9 °F | 51.4 °F | 4.57 in. |
| May | 45.4 °F | 63.4 °F | 3.76 in. |
| June | 54.6 °F | 71.6 °F | 4.43 in. |
| July | 60.7 °F | 77.5 °F | 3.28 in. |
| August | 59.9 °F | 76.9 °F | 3.45 in. |
| September | 52.5 °F | 69.5 °F | 4.04 in. |
| October | 41.6 °F | 57.3 °F | 5.77 in. |
| November | 31.0 °F | 45.6 °F | 4.62 in. |
| December | 20.1 °F | 34.7 °F | 4.74 in. |
| Annual | 37.4 °F | 53.9 °F | 50.25 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |