Mongaup Valley, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.9 °F (low) to 57.6 °F (high). Annual precipitation averages 45.9 Inches. Mongaup Valley 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °F | 32.2 °F | 3.2 in. |
| February | 15.8 °F | 35.2 °F | 2.37 in. |
| March | 23.7 °F | 43.7 °F | 3.36 in. |
| April | 34.3 °F | 57.0 °F | 3.65 in. |
| May | 44.8 °F | 68.4 °F | 3.96 in. |
| June | 54.2 °F | 76.4 °F | 5.04 in. |
| July | 58.7 °F | 81.1 °F | 4.34 in. |
| August | 57.1 °F | 79.3 °F | 4.22 in. |
| September | 50.0 °F | 72.3 °F | 4.52 in. |
| October | 38.8 °F | 60.2 °F | 4.2 in. |
| November | 29.5 °F | 48.1 °F | 3.21 in. |
| December | 21.3 °F | 37.1 °F | 3.79 in. |
| Annual | 36.9 °F | 57.6 °F | 45.86 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 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 |