Cassadaga, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 13.4 °C (high). Annual precipitation averages 1254.5 Millimeters. Cassadaga is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | -0.6 °C | 106.43 mm |
| February | -8.8 °C | 0.6 °C | 70.87 mm |
| March | -5 °C | 5.4 °C | 86.61 mm |
| April | 1.1 °C | 12.8 °C | 101.85 mm |
| May | 7.3 °C | 19.4 °C | 102.11 mm |
| June | 12.4 °C | 23.9 °C | 102.62 mm |
| July | 14.8 °C | 26 °C | 122.68 mm |
| August | 14.2 °C | 25.3 °C | 99.06 mm |
| September | 10.4 °C | 21.9 °C | 116.08 mm |
| October | 4.7 °C | 15.1 °C | 125.22 mm |
| November | -0.4 °C | 8.3 °C | 105.92 mm |
| December | -4.8 °C | 2.3 °C | 115.06 mm |
| Annual | 3.1 °C | 13.4 °C | 1254.51 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |