Scituate, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 14.9 °C (high). Annual precipitation averages 1309.6 Millimeters. Scituate is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 3.2 °C | 108.46 mm |
| February | -4.1 °C | 4.3 °C | 101.35 mm |
| March | -0.8 °C | 7.2 °C | 140.46 mm |
| April | 4 °C | 12.7 °C | 115.06 mm |
| May | 9.5 °C | 18.4 °C | 92.2 mm |
| June | 14.4 °C | 23.5 °C | 96.77 mm |
| July | 17.9 °C | 26.9 °C | 88.14 mm |
| August | 17.4 °C | 25.9 °C | 92.96 mm |
| September | 14.1 °C | 22.5 °C | 101.6 mm |
| October | 8.4 °C | 16.8 °C | 130.05 mm |
| November | 3.2 °C | 11.2 °C | 114.55 mm |
| December | -1.3 °C | 6.3 °C | 128.02 mm |
| Annual | 6.5 °C | 14.9 °C | 1309.62 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |