Chaumont, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.4 °F (low) to 54.7 °F (high). Annual precipitation averages 40.4 Inches. Chaumont is located in USDA Plant Hardiness Zone 5a. 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 | 11.4 °F | 28.5 °F | 3.47 in. |
| February | 12.1 °F | 30.2 °F | 2.65 in. |
| March | 21.7 °F | 38.7 °F | 2.74 in. |
| April | 34.5 °F | 52.6 °F | 3.36 in. |
| May | 46.1 °F | 65.1 °F | 3.16 in. |
| June | 55.9 °F | 74.0 °F | 3.36 in. |
| July | 61.5 °F | 78.9 °F | 3.06 in. |
| August | 59.9 °F | 77.9 °F | 3.28 in. |
| September | 52.3 °F | 71.0 °F | 3.57 in. |
| October | 41.7 °F | 58.2 °F | 4.41 in. |
| November | 31.4 °F | 46.4 °F | 3.75 in. |
| December | 20.6 °F | 34.9 °F | 3.61 in. |
| Annual | 37.4 °F | 54.7 °F | 40.42 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 5a : -20°F to -15°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 |