Franklin, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.8 °C (low) to 14 °C (high). Annual precipitation averages 1124.7 Millimeters. Franklin is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.6 °C | -0.2 °C | 74.93 mm |
| February | -10 °C | 1.3 °C | 61.47 mm |
| March | -6.2 °C | 5.8 °C | 85.6 mm |
| April | -0.1 °C | 13.7 °C | 97.28 mm |
| May | 6 °C | 20.6 °C | 93.73 mm |
| June | 11.2 °C | 24.8 °C | 118.36 mm |
| July | 13.7 °C | 27.2 °C | 108.2 mm |
| August | 13 °C | 26.3 °C | 115.82 mm |
| September | 9.2 °C | 22.6 °C | 100.58 mm |
| October | 3.4 °C | 15.6 °C | 103.12 mm |
| November | -1.9 °C | 8.3 °C | 82.04 mm |
| December | -6.3 °C | 2.5 °C | 83.57 mm |
| Annual | 1.8 °C | 14 °C | 1124.7 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |