Clayton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.9 °F (low) to 53.9 °F (high). Annual precipitation averages 39.3 Inches. Clayton 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 | 11.7 °F | 27.7 °F | 3.15 in. |
| February | 12.4 °F | 29.6 °F | 2.45 in. |
| March | 22.0 °F | 38.1 °F | 2.61 in. |
| April | 34.8 °F | 51.6 °F | 3.25 in. |
| May | 46.6 °F | 64.0 °F | 3.22 in. |
| June | 56.3 °F | 72.7 °F | 3.43 in. |
| July | 62.0 °F | 77.8 °F | 3.17 in. |
| August | 60.7 °F | 77.3 °F | 3.3 in. |
| September | 52.9 °F | 70.3 °F | 3.54 in. |
| October | 42.4 °F | 57.5 °F | 4.31 in. |
| November | 31.9 °F | 45.7 °F | 3.52 in. |
| December | 20.8 °F | 34.2 °F | 3.32 in. |
| Annual | 37.9 °F | 53.9 °F | 39.27 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 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |