Knox, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 56.1 °F (high). Annual precipitation averages 42.3 Inches. Knox is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.1 °F | 30.1 °F | 2.69 in. |
| February | 12.9 °F | 32.7 °F | 2.42 in. |
| March | 20.2 °F | 40.5 °F | 3.49 in. |
| April | 32.6 °F | 55.1 °F | 3.41 in. |
| May | 44.7 °F | 67.6 °F | 3.58 in. |
| June | 53.4 °F | 75.5 °F | 4.38 in. |
| July | 57.8 °F | 80.2 °F | 4.17 in. |
| August | 56.2 °F | 78.7 °F | 3.85 in. |
| September | 48.7 °F | 71.9 °F | 3.57 in. |
| October | 37.6 °F | 58.8 °F | 4.51 in. |
| November | 28.6 °F | 46.3 °F | 2.87 in. |
| December | 19.6 °F | 35.9 °F | 3.4 in. |
| Annual | 35.4 °F | 56.1 °F | 42.34 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |