Old Orchard Beach, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.4 °C (low) to 13.6 °C (high). Annual precipitation averages 1237 Millimeters. 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 | -7.9 °C | 0.5 °C | 91.19 mm |
| February | -7.3 °C | 1.7 °C | 92.2 mm |
| March | -3.3 °C | 5.5 °C | 114.81 mm |
| April | 2.3 °C | 12.1 °C | 109.98 mm |
| May | 7.9 °C | 18 °C | 90.42 mm |
| June | 13.2 °C | 23.2 °C | 108.97 mm |
| July | 16.4 °C | 26.3 °C | 82.3 mm |
| August | 16 °C | 25.8 °C | 87.12 mm |
| September | 11.9 °C | 21.9 °C | 95.5 mm |
| October | 6.3 °C | 15.4 °C | 135.64 mm |
| November | 1.2 °C | 9.3 °C | 109.98 mm |
| December | -4.1 °C | 3.8 °C | 118.87 mm |
| Annual | 4.4 °C | 13.6 °C | 1236.98 mm |
| 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 : -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 |