Mountain Dale, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38 °F (low) to 58.1 °F (high). Annual precipitation averages 50.5 Inches. Mountain Dale 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 | 15.8 °F | 32.8 °F | 3.46 in. |
| February | 16.9 °F | 35.8 °F | 2.75 in. |
| March | 24.8 °F | 44.2 °F | 3.81 in. |
| April | 35.5 °F | 57.5 °F | 3.87 in. |
| May | 46.1 °F | 68.7 °F | 4.06 in. |
| June | 55.4 °F | 77.0 °F | 5.04 in. |
| July | 59.8 °F | 81.9 °F | 4.87 in. |
| August | 58.4 °F | 79.8 °F | 4.59 in. |
| September | 51.2 °F | 72.7 °F | 5.17 in. |
| October | 40.0 °F | 60.3 °F | 4.89 in. |
| November | 30.5 °F | 48.6 °F | 3.72 in. |
| December | 22.1 °F | 37.6 °F | 4.31 in. |
| Annual | 38 °F | 58.1 °F | 50.54 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 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |