Frewsburg, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.9 °F (low) to 57.3 °F (high). Annual precipitation averages 45.9 Inches. Frewsburg is located in USDA Plant Hardiness Zone 6a. 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 | 15.8 °F | 31.7 °F | 3.64 in. |
| February | 16.1 °F | 34.3 °F | 2.62 in. |
| March | 23.0 °F | 43.1 °F | 3.12 in. |
| April | 33.7 °F | 56.5 °F | 3.86 in. |
| May | 44.5 °F | 68.6 °F | 4.0 in. |
| June | 53.5 °F | 76.3 °F | 4.42 in. |
| July | 57.4 °F | 80.5 °F | 4.57 in. |
| August | 56.2 °F | 79.1 °F | 3.85 in. |
| September | 49.8 °F | 72.8 °F | 4.09 in. |
| October | 39.5 °F | 60.1 °F | 4.16 in. |
| November | 30.6 °F | 47.4 °F | 3.69 in. |
| December | 23.0 °F | 36.7 °F | 3.84 in. |
| Annual | 36.9 °F | 57.3 °F | 45.86 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 6a : -10°F to -5°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 |