Bolton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.6 °F (low) to 55.8 °F (high). Annual precipitation averages 43.8 Inches. Bolton 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.4 °F | 29.5 °F | 3.31 in. |
| February | 10.2 °F | 32.7 °F | 2.63 in. |
| March | 19.8 °F | 41.4 °F | 3.47 in. |
| April | 32.1 °F | 54.7 °F | 3.69 in. |
| May | 44.0 °F | 67.5 °F | 3.69 in. |
| June | 53.3 °F | 75.8 °F | 4.52 in. |
| July | 58.3 °F | 80.3 °F | 4.26 in. |
| August | 56.4 °F | 78.4 °F | 3.46 in. |
| September | 48.7 °F | 71.1 °F | 3.55 in. |
| October | 37.9 °F | 57.9 °F | 4.14 in. |
| November | 27.6 °F | 45.7 °F | 3.26 in. |
| December | 17.9 °F | 34.7 °F | 3.86 in. |
| Annual | 34.6 °F | 55.8 °F | 43.84 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |