Oakfield, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.7 °C (low) to 10.8 °C (high). Annual precipitation averages 1145.8 Millimeters. Oakfield is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.2 °C | -5.1 °C | 91.95 mm |
| February | -15.2 °C | -3.4 °C | 71.37 mm |
| March | -9.2 °C | 2.1 °C | 86.36 mm |
| April | -1.8 °C | 9.5 °C | 89.92 mm |
| May | 4.4 °C | 17.6 °C | 94.49 mm |
| June | 9.7 °C | 22.4 °C | 109.73 mm |
| July | 13 °C | 25.2 °C | 99.31 mm |
| August | 11.9 °C | 24.8 °C | 91.44 mm |
| September | 7.6 °C | 20.3 °C | 90.42 mm |
| October | 1.7 °C | 12.5 °C | 113.28 mm |
| November | -3.7 °C | 4.9 °C | 100.58 mm |
| December | -10.8 °C | -1.6 °C | 106.93 mm |
| Annual | -0.7 °C | 10.8 °C | 1145.78 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |