Brunswick, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.8 °F (low) to 57.7 °F (high). Annual precipitation averages 44.4 Inches. Brunswick is located in USDA Plant Hardiness Zone 5b. 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 | 14.3 °F | 31.5 °F | 3.02 in. |
| February | 15.7 °F | 34.3 °F | 2.35 in. |
| March | 24.1 °F | 43.1 °F | 3.05 in. |
| April | 35.5 °F | 57.3 °F | 3.42 in. |
| May | 46.7 °F | 69.1 °F | 3.71 in. |
| June | 55.7 °F | 77.2 °F | 4.75 in. |
| July | 59.7 °F | 82.3 °F | 4.71 in. |
| August | 58.8 °F | 80.0 °F | 4.39 in. |
| September | 51.0 °F | 73.0 °F | 4.03 in. |
| October | 40.1 °F | 60.3 °F | 4.37 in. |
| November | 30.4 °F | 48.0 °F | 3.15 in. |
| December | 21.5 °F | 36.8 °F | 3.49 in. |
| Annual | 37.8 °F | 57.7 °F | 44.44 in. |
| 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |