Brewster, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 60.7 °F (high). Annual precipitation averages 41.1 Inches. Brewster 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 | 19.7 °F | 34.9 °F | 2.97 in. |
| February | 20.8 °F | 37.9 °F | 2.26 in. |
| March | 28.5 °F | 47.6 °F | 3.18 in. |
| April | 39.0 °F | 61.2 °F | 3.67 in. |
| May | 49.6 °F | 71.4 °F | 4.02 in. |
| June | 58.5 °F | 79.8 °F | 4.73 in. |
| July | 62.3 °F | 83.2 °F | 4.18 in. |
| August | 60.5 °F | 82.0 °F | 3.81 in. |
| September | 53.4 °F | 75.8 °F | 3.28 in. |
| October | 42.3 °F | 63.7 °F | 3.19 in. |
| November | 32.8 °F | 50.8 °F | 2.9 in. |
| December | 25.4 °F | 39.7 °F | 2.9 in. |
| Annual | 41.1 °F | 60.7 °F | 41.09 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |