Oakland, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.7 °F (low) to 54.8 °F (high). Annual precipitation averages 43.9 Inches. Oakland 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 | 8.8 °F | 28.2 °F | 3.15 in. |
| February | 10.4 °F | 31.4 °F | 2.67 in. |
| March | 20.5 °F | 39.9 °F | 3.15 in. |
| April | 32.3 °F | 52.8 °F | 3.75 in. |
| May | 43.2 °F | 65.2 °F | 3.4 in. |
| June | 52.7 °F | 73.8 °F | 4.11 in. |
| July | 58.5 °F | 79.1 °F | 3.49 in. |
| August | 56.9 °F | 78.3 °F | 3.55 in. |
| September | 49.0 °F | 70.8 °F | 3.75 in. |
| October | 38.2 °F | 57.9 °F | 5.02 in. |
| November | 28.3 °F | 45.4 °F | 3.89 in. |
| December | 17.3 °F | 34.2 °F | 3.92 in. |
| Annual | 34.7 °F | 54.8 °F | 43.85 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |