Alden, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.4 °F (low) to 56.6 °F (high). Annual precipitation averages 41.7 Inches. 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 | 16.6 °F | 31.9 °F | 3.29 in. |
| February | 17.0 °F | 33.4 °F | 2.45 in. |
| March | 23.9 °F | 41.8 °F | 3.02 in. |
| April | 34.7 °F | 54.9 °F | 3.4 in. |
| May | 46.0 °F | 67.1 °F | 3.29 in. |
| June | 55.5 °F | 75.4 °F | 3.96 in. |
| July | 60.0 °F | 79.5 °F | 3.68 in. |
| August | 58.6 °F | 78.7 °F | 3.47 in. |
| September | 51.7 °F | 72.3 °F | 3.98 in. |
| October | 41.3 °F | 59.6 °F | 4.14 in. |
| November | 31.8 °F | 47.5 °F | 3.67 in. |
| December | 23.3 °F | 37.0 °F | 3.39 in. |
| Annual | 38.4 °F | 56.6 °F | 41.74 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |