Glens Falls, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.8 °F (low) to 57.6 °F (high). Annual precipitation averages 42.7 Inches. Glens Falls is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.5 °F | 30.5 °F | 3.18 in. |
| February | 12.3 °F | 33.7 °F | 2.55 in. |
| March | 22.5 °F | 42.7 °F | 3.29 in. |
| April | 34.9 °F | 57.4 °F | 3.68 in. |
| May | 46.3 °F | 69.8 °F | 3.32 in. |
| June | 55.4 °F | 77.9 °F | 3.95 in. |
| July | 60.0 °F | 82.6 °F | 4.28 in. |
| August | 58.6 °F | 80.4 °F | 3.69 in. |
| September | 50.8 °F | 73.3 °F | 3.39 in. |
| October | 39.6 °F | 60.0 °F | 4.27 in. |
| November | 29.4 °F | 47.2 °F | 3.34 in. |
| December | 20.2 °F | 35.9 °F | 3.73 in. |
| Annual | 36.8 °F | 57.6 °F | 42.67 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |