Old Orchard Beach, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.9 °F (low) to 56.5 °F (high). Annual precipitation averages 48.7 Inches. Old Orchard Beach 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.8 °F | 32.9 °F | 3.59 in. |
| February | 18.9 °F | 35.1 °F | 3.63 in. |
| March | 26.1 °F | 41.9 °F | 4.52 in. |
| April | 36.2 °F | 53.8 °F | 4.33 in. |
| May | 46.2 °F | 64.4 °F | 3.56 in. |
| June | 55.7 °F | 73.8 °F | 4.29 in. |
| July | 61.6 °F | 79.3 °F | 3.24 in. |
| August | 60.8 °F | 78.5 °F | 3.43 in. |
| September | 53.4 °F | 71.4 °F | 3.76 in. |
| October | 43.4 °F | 59.8 °F | 5.34 in. |
| November | 34.2 °F | 48.7 °F | 4.33 in. |
| December | 24.7 °F | 38.8 °F | 4.68 in. |
| Annual | 39.9 °F | 56.5 °F | 48.7 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |