Oak Hill, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.3 °C (low) to 13.4 °C (high). Annual precipitation averages 1230.4 Millimeters. Oak Hill 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.4 °C | 0.2 °C | 89.41 mm |
| February | -7.7 °C | 1.6 °C | 89.92 mm |
| March | -3.2 °C | 5.5 °C | 107.7 mm |
| April | 2.4 °C | 11.8 °C | 111.51 mm |
| May | 7.9 °C | 17.6 °C | 91.44 mm |
| June | 13.2 °C | 23 °C | 107.95 mm |
| July | 16.5 °C | 26.2 °C | 91.19 mm |
| August | 16.1 °C | 25.8 °C | 86.36 mm |
| September | 11.9 °C | 21.8 °C | 97.79 mm |
| October | 6 °C | 15.2 °C | 131.06 mm |
| November | 0.8 °C | 9.1 °C | 108.46 mm |
| December | -4.5 °C | 3.5 °C | 117.6 mm |
| Annual | 4.3 °C | 13.4 °C | 1230.39 mm |
| 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |