Jewett, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.3 °F (low) to 55.8 °F (high). Annual precipitation averages 49 Inches. Jewett is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.5 °F | 31.6 °F | 3.42 in. |
| February | 12.7 °F | 34.6 °F | 2.75 in. |
| March | 19.2 °F | 41.6 °F | 3.92 in. |
| April | 30.6 °F | 54.4 °F | 3.99 in. |
| May | 41.0 °F | 66.5 °F | 3.99 in. |
| June | 49.9 °F | 74.3 °F | 4.7 in. |
| July | 54.3 °F | 78.5 °F | 4.22 in. |
| August | 52.7 °F | 76.8 °F | 4.3 in. |
| September | 46.0 °F | 70.3 °F | 4.9 in. |
| October | 35.6 °F | 58.4 °F | 5.19 in. |
| November | 26.9 °F | 46.5 °F | 3.62 in. |
| December | 18.6 °F | 36.2 °F | 3.98 in. |
| Annual | 33.3 °F | 55.8 °F | 48.98 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |