Fredonia, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.4 °C (low) to 14.1 °C (high). Annual precipitation averages 1102.4 Millimeters. Fredonia is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.4 °C | 1 °C | 75.44 mm |
| February | -6.5 °C | 1.7 °C | 57.15 mm |
| March | -2.8 °C | 5.9 °C | 72.9 mm |
| April | 2.9 °C | 12.9 °C | 87.38 mm |
| May | 9.3 °C | 19.3 °C | 92.46 mm |
| June | 14.8 °C | 24.4 °C | 92.71 mm |
| July | 17.3 °C | 26.4 °C | 103.63 mm |
| August | 16.7 °C | 25.8 °C | 92.46 mm |
| September | 13.1 °C | 22.6 °C | 111.25 mm |
| October | 7.3 °C | 16.1 °C | 120.4 mm |
| November | 2 °C | 9.7 °C | 102.36 mm |
| December | -2.6 °C | 3.9 °C | 94.23 mm |
| Annual | 5.4 °C | 14.1 °C | 1102.37 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |