Naples, Maine has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 1.7 °C (low) to 13.4 °C (high). Annual precipitation averages 1249.7 Millimeters. Naples 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.3 °C | -1.1 °C | 81.79 mm |
| February | -11.8 °C | 0.6 °C | 85.09 mm |
| March | -6.1 °C | 5.3 °C | 99.06 mm |
| April | 0.2 °C | 12.3 °C | 111.25 mm |
| May | 6.3 °C | 19.1 °C | 94.74 mm |
| June | 11.9 °C | 23.8 °C | 119.89 mm |
| July | 15.1 °C | 27.2 °C | 106.43 mm |
| August | 14.1 °C | 26.6 °C | 96.52 mm |
| September | 9.8 °C | 22.2 °C | 100.08 mm |
| October | 3.4 °C | 14.9 °C | 137.67 mm |
| November | -2.1 °C | 8.1 °C | 107.44 mm |
| December | -7.9 °C | 2.1 °C | 109.73 mm |
| Annual | 1.7 °C | 13.4 °C | 1249.69 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |