Fonda, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.5 °F (low) to 57.6 °F (high). Annual precipitation averages 42.7 Inches. Fonda is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °F | 31.0 °F | 3.17 in. |
| February | 15.9 °F | 33.8 °F | 2.54 in. |
| March | 24.0 °F | 42.2 °F | 3.3 in. |
| April | 35.8 °F | 56.5 °F | 3.48 in. |
| May | 47.5 °F | 69.4 °F | 3.53 in. |
| June | 56.6 °F | 77.6 °F | 4.52 in. |
| July | 61.7 °F | 82.0 °F | 4.31 in. |
| August | 59.9 °F | 80.7 °F | 3.93 in. |
| September | 52.6 °F | 73.4 °F | 3.54 in. |
| October | 40.9 °F | 61.2 °F | 3.91 in. |
| November | 31.0 °F | 47.3 °F | 3.25 in. |
| December | 22.0 °F | 36.2 °F | 3.26 in. |
| Annual | 38.5 °F | 57.6 °F | 42.74 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |