Kittery Point, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4 °C (low) to 14.1 °C (high). Annual precipitation averages 1209 Millimeters. Kittery Point is located in USDA Plant Hardiness Zone 6a. 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 | -7.8 °C | 0.9 °C | 94.74 mm |
| February | -7.2 °C | 2.3 °C | 90.17 mm |
| March | -3.3 °C | 6.3 °C | 104.9 mm |
| April | 1.8 °C | 12.8 °C | 112.01 mm |
| May | 7.1 °C | 18.4 °C | 93.47 mm |
| June | 12.2 °C | 23.7 °C | 105.92 mm |
| July | 15.7 °C | 26.9 °C | 87.88 mm |
| August | 15 °C | 26.3 °C | 83.06 mm |
| September | 11.7 °C | 22.2 °C | 97.79 mm |
| October | 5.9 °C | 15.5 °C | 129.03 mm |
| November | 0.8 °C | 9.7 °C | 98.81 mm |
| December | -4.1 °C | 3.9 °C | 111.25 mm |
| Annual | 4 °C | 14.1 °C | 1209.03 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |