Scotland, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.7 °C (low) to 16 °C (high). Annual precipitation averages 1245.6 Millimeters. Scotland is located in USDA Plant Hardiness Zone 6b. 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 | -7.3 °C | 2.8 °C | 97.03 mm |
| February | -6.5 °C | 4.2 °C | 84.33 mm |
| March | -2.4 °C | 8.4 °C | 116.84 mm |
| April | 3 °C | 15.4 °C | 112.78 mm |
| May | 8.6 °C | 21.1 °C | 86.36 mm |
| June | 13.7 °C | 25.6 °C | 98.81 mm |
| July | 17.1 °C | 28.4 °C | 97.28 mm |
| August | 16 °C | 27.5 °C | 105.16 mm |
| September | 11.9 °C | 23.8 °C | 105.92 mm |
| October | 5.7 °C | 17.5 °C | 121.16 mm |
| November | 0.4 °C | 11.4 °C | 102.11 mm |
| December | -3.9 °C | 5.7 °C | 117.86 mm |
| Annual | 4.7 °C | 16 °C | 1245.64 mm |
| 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 6b : -20.6°C to -17.8°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 |