Brewster Hill, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 15.6 °C (high). Annual precipitation averages 1253.5 Millimeters. Brewster Hill 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 | -7.7 °C | 2.1 °C | 96.52 mm |
| February | -6.6 °C | 3.8 °C | 67.56 mm |
| March | -2.6 °C | 8.2 °C | 98.55 mm |
| April | 3.4 °C | 15.3 °C | 97.28 mm |
| May | 8.8 °C | 21 °C | 86.61 mm |
| June | 13.9 °C | 25.5 °C | 100.84 mm |
| July | 16.9 °C | 28.3 °C | 116.84 mm |
| August | 16.2 °C | 27.3 °C | 138.43 mm |
| September | 12 °C | 23.5 °C | 115.57 mm |
| October | 5.7 °C | 16.9 °C | 122.68 mm |
| November | 0.4 °C | 10.8 °C | 106.68 mm |
| December | -4.1 °C | 4.8 °C | 105.92 mm |
| Annual | 4.7 °C | 15.6 °C | 1253.48 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |