South Eliot, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 14.3 °C (high). Annual precipitation averages 1224 Millimeters. South Eliot 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 | -8.9 °C | 0.9 °C | 88.65 mm |
| February | -8.1 °C | 2.4 °C | 90.42 mm |
| March | -3.8 °C | 6.4 °C | 112.78 mm |
| April | 1.8 °C | 13.2 °C | 115.82 mm |
| May | 7.3 °C | 18.8 °C | 98.81 mm |
| June | 12.7 °C | 24.1 °C | 107.19 mm |
| July | 15.9 °C | 27.3 °C | 93.98 mm |
| August | 15.1 °C | 26.8 °C | 82.04 mm |
| September | 11.1 °C | 22.7 °C | 96.52 mm |
| October | 4.8 °C | 15.8 °C | 124.46 mm |
| November | -0.3 °C | 9.8 °C | 100.58 mm |
| December | -5.3 °C | 3.9 °C | 112.78 mm |
| Annual | 3.5 °C | 14.3 °C | 1224.03 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |