Fort Kent, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.4 °C (low) to 9.6 °C (high). Annual precipitation averages 1063.2 Millimeters. Fort Kent is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -19.3 °C | -7 °C | 74.17 mm |
| February | -18.8 °C | -5.1 °C | 60.96 mm |
| March | -12.1 °C | 0.7 °C | 69.85 mm |
| April | -3.2 °C | 8.1 °C | 81.03 mm |
| May | 3.4 °C | 16.6 °C | 84.58 mm |
| June | 8.7 °C | 21.9 °C | 109.47 mm |
| July | 11.9 °C | 24.6 °C | 114.55 mm |
| August | 10.8 °C | 24 °C | 95.25 mm |
| September | 6.4 °C | 19.3 °C | 92.96 mm |
| October | 0.7 °C | 11.4 °C | 107.44 mm |
| November | -4.8 °C | 3.7 °C | 84.33 mm |
| December | -13 °C | -3.1 °C | 88.65 mm |
| Annual | -2.4 °C | 9.6 °C | 1063.24 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |