Hannawa Falls, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.4 °C (low) to 12.4 °C (high). Annual precipitation averages 1148.8 Millimeters. Hannawa Falls is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.6 °C | -3.1 °C | 81.79 mm |
| February | -13 °C | -1.8 °C | 68.07 mm |
| March | -7.4 °C | 3.5 °C | 77.72 mm |
| April | 0.3 °C | 11.7 °C | 96.27 mm |
| May | 7.2 °C | 19.6 °C | 92.96 mm |
| June | 12.4 °C | 23.9 °C | 113.28 mm |
| July | 14.9 °C | 26.5 °C | 109.98 mm |
| August | 14.1 °C | 25.7 °C | 94.74 mm |
| September | 9.6 °C | 21.6 °C | 110.49 mm |
| October | 3.6 °C | 14.2 °C | 123.44 mm |
| November | -2.2 °C | 7.1 °C | 95 mm |
| December | -8.8 °C | 0.4 °C | 85.09 mm |
| Annual | 1.4 °C | 12.4 °C | 1148.83 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |