Franklin Square, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8 °C (low) to 17 °C (high). Annual precipitation averages 1242.3 Millimeters. Franklin Square is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 4.4 °C | 96.27 mm |
| February | -2.6 °C | 5.7 °C | 77.22 mm |
| March | 0.7 °C | 9.6 °C | 112.27 mm |
| April | 5.8 °C | 15.7 °C | 102.36 mm |
| May | 11.1 °C | 21.1 °C | 100.84 mm |
| June | 16.5 °C | 26.2 °C | 112.27 mm |
| July | 19.8 °C | 29.3 °C | 109.73 mm |
| August | 19.2 °C | 28.4 °C | 114.05 mm |
| September | 15.5 °C | 24.8 °C | 103.12 mm |
| October | 9.4 °C | 18.7 °C | 118.87 mm |
| November | 4.2 °C | 12.7 °C | 85.34 mm |
| December | 0 °C | 7.4 °C | 109.98 mm |
| Annual | 8 °C | 17 °C | 1242.32 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |