Afton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.9 °F (low) to 58 °F (high). Annual precipitation averages 44.7 Inches. Afton 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 | 14.7 °F | 31.6 °F | 3.06 in. |
| February | 15.7 °F | 34.2 °F | 2.58 in. |
| March | 22.5 °F | 42.8 °F | 3.31 in. |
| April | 33.5 °F | 57.8 °F | 3.75 in. |
| May | 44.6 °F | 70.3 °F | 3.84 in. |
| June | 53.8 °F | 78.3 °F | 4.84 in. |
| July | 58.4 °F | 82.0 °F | 4.35 in. |
| August | 57.1 °F | 80.5 °F | 4.42 in. |
| September | 50.2 °F | 73.4 °F | 4.04 in. |
| October | 39.6 °F | 61.1 °F | 4.07 in. |
| November | 30.1 °F | 47.2 °F | 3.17 in. |
| December | 22.2 °F | 36.8 °F | 3.25 in. |
| Annual | 36.9 °F | 58 °F | 44.68 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |