Alden, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 13.7 °C (high). Annual precipitation averages 1060.2 Millimeters. Alden is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | -0.1 °C | 83.57 mm |
| February | -8.3 °C | 0.8 °C | 62.23 mm |
| March | -4.5 °C | 5.4 °C | 76.71 mm |
| April | 1.5 °C | 12.7 °C | 86.36 mm |
| May | 7.8 °C | 19.5 °C | 83.57 mm |
| June | 13.1 °C | 24.1 °C | 100.58 mm |
| July | 15.6 °C | 26.4 °C | 93.47 mm |
| August | 14.8 °C | 25.9 °C | 88.14 mm |
| September | 10.9 °C | 22.4 °C | 101.09 mm |
| October | 5.2 °C | 15.3 °C | 105.16 mm |
| November | -0.1 °C | 8.6 °C | 93.22 mm |
| December | -4.8 °C | 2.8 °C | 86.11 mm |
| Annual | 3.6 °C | 13.7 °C | 1060.21 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |