Ballston Spa, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 14.7 °C (high). Annual precipitation averages 1164.9 Millimeters. Ballston Spa is located in USDA Plant Hardiness Zone 5b. 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 | -9.5 °C | -0.2 °C | 84.33 mm |
| February | -8.7 °C | 1.5 °C | 68.33 mm |
| March | -4 °C | 6.4 °C | 88.9 mm |
| April | 2.3 °C | 14.7 °C | 95 mm |
| May | 8.8 °C | 21.4 °C | 95 mm |
| June | 13.8 °C | 25.8 °C | 118.36 mm |
| July | 16.4 °C | 28.4 °C | 122.94 mm |
| August | 15.6 °C | 27.3 °C | 102.62 mm |
| September | 11.3 °C | 23.3 °C | 98.04 mm |
| October | 5.1 °C | 16.2 °C | 108.71 mm |
| November | -0.5 °C | 9 °C | 86.61 mm |
| December | -5.4 °C | 2.7 °C | 96.01 mm |
| Annual | 3.8 °C | 14.7 °C | 1164.85 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |