Standish, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 13.3 °C (high). Annual precipitation averages 1275.3 Millimeters. Standish 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 | -12.2 °C | -1.1 °C | 85.34 mm |
| February | -11.7 °C | 0.6 °C | 88.65 mm |
| March | -6.3 °C | 5.2 °C | 107.19 mm |
| April | -0.1 °C | 12.3 °C | 114.81 mm |
| May | 6.1 °C | 18.9 °C | 98.55 mm |
| June | 11.9 °C | 23.7 °C | 117.35 mm |
| July | 15 °C | 26.9 °C | 101.85 mm |
| August | 14.1 °C | 26.4 °C | 91.95 mm |
| September | 9.7 °C | 22 °C | 102.36 mm |
| October | 3.2 °C | 14.6 °C | 140.46 mm |
| November | -2.2 °C | 7.9 °C | 111.25 mm |
| December | -8.1 °C | 2.1 °C | 115.57 mm |
| Annual | 1.6 °C | 13.3 °C | 1275.33 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |