Prospect, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.1 °F (low) to 53.8 °F (high). Annual precipitation averages 52.9 Inches. Prospect is located in USDA Plant Hardiness Zone 5a. 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 | 9.2 °F | 27.3 °F | 3.75 in. |
| February | 10.7 °F | 29.9 °F | 3.52 in. |
| March | 18.5 °F | 38.1 °F | 4.03 in. |
| April | 31.3 °F | 52.6 °F | 3.92 in. |
| May | 43.1 °F | 66.3 °F | 4.93 in. |
| June | 52.2 °F | 73.9 °F | 4.97 in. |
| July | 57.0 °F | 78.3 °F | 4.84 in. |
| August | 55.5 °F | 76.6 °F | 4.37 in. |
| September | 48.2 °F | 69.6 °F | 4.77 in. |
| October | 37.8 °F | 56.7 °F | 5.27 in. |
| November | 27.8 °F | 43.9 °F | 4.31 in. |
| December | 17.6 °F | 32.6 °F | 4.21 in. |
| Annual | 34.1 °F | 53.8 °F | 52.89 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |