Nobleboro, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.3 °F (low) to 55.1 °F (high). Annual precipitation averages 49.6 Inches. Nobleboro is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.8 °F | 30.3 °F | 3.85 in. |
| February | 13.8 °F | 33.3 °F | 3.54 in. |
| March | 22.9 °F | 41.0 °F | 4.29 in. |
| April | 33.2 °F | 53.0 °F | 4.36 in. |
| May | 43.6 °F | 64.0 °F | 3.77 in. |
| June | 53.0 °F | 72.6 °F | 4.43 in. |
| July | 59.0 °F | 78.4 °F | 3.46 in. |
| August | 57.8 °F | 77.6 °F | 3.24 in. |
| September | 50.6 °F | 70.3 °F | 4.04 in. |
| October | 39.8 °F | 58.1 °F | 5.3 in. |
| November | 30.2 °F | 46.7 °F | 4.61 in. |
| December | 19.7 °F | 36.1 °F | 4.73 in. |
| Annual | 36.3 °F | 55.1 °F | 49.62 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |