Saranac Lake, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.7 °C (low) to 11.4 °C (high). Annual precipitation averages 1094 Millimeters. Saranac Lake is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.9 °C | -3.3 °C | 72.9 mm |
| February | -14.2 °C | -1.8 °C | 58.42 mm |
| March | -9.4 °C | 2.9 °C | 71.37 mm |
| April | -2.1 °C | 10.6 °C | 81.28 mm |
| May | 4.3 °C | 18.2 °C | 94.23 mm |
| June | 9.7 °C | 22.8 °C | 116.33 mm |
| July | 12.2 °C | 25 °C | 108.2 mm |
| August | 11.3 °C | 24.1 °C | 105.16 mm |
| September | 7.1 °C | 20.5 °C | 98.04 mm |
| October | 1.8 °C | 12.8 °C | 115.82 mm |
| November | -3.8 °C | 5.6 °C | 85.6 mm |
| December | -10.2 °C | -0.7 °C | 86.61 mm |
| Annual | -0.7 °C | 11.4 °C | 1093.96 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°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 |