Frankfort, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 14.5 °C (high). Annual precipitation averages 1176.5 Millimeters. Frankfort 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.6 °C | -0.6 °C | 68.58 mm |
| February | -9.1 °C | 0.8 °C | 67.56 mm |
| March | -4.5 °C | 5.4 °C | 85.85 mm |
| April | 1.9 °C | 14.1 °C | 99.57 mm |
| May | 8.2 °C | 21.4 °C | 99.31 mm |
| June | 13.7 °C | 26 °C | 122.43 mm |
| July | 16.3 °C | 28.5 °C | 126.49 mm |
| August | 15.5 °C | 27.5 °C | 111 mm |
| September | 11.5 °C | 23.6 °C | 102.87 mm |
| October | 5.4 °C | 16.2 °C | 112.52 mm |
| November | 0.1 °C | 8.7 °C | 95.76 mm |
| December | -5.3 °C | 2.4 °C | 84.58 mm |
| Annual | 3.7 °C | 14.5 °C | 1176.52 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |