Phelps, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.8 °F (low) to 57.7 °F (high). Annual precipitation averages 36.2 Inches. Phelps is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.8 °F | 32.4 °F | 2.33 in. |
| February | 18.9 °F | 34.0 °F | 1.89 in. |
| March | 25.8 °F | 42.3 °F | 2.64 in. |
| April | 36.4 °F | 55.7 °F | 2.97 in. |
| May | 47.5 °F | 68.7 °F | 3.17 in. |
| June | 57.0 °F | 77.4 °F | 3.67 in. |
| July | 61.6 °F | 81.9 °F | 3.74 in. |
| August | 60.0 °F | 80.3 °F | 3.51 in. |
| September | 52.9 °F | 73.1 °F | 3.29 in. |
| October | 42.5 °F | 60.5 °F | 3.62 in. |
| November | 33.1 °F | 48.2 °F | 2.8 in. |
| December | 24.4 °F | 37.4 °F | 2.58 in. |
| Annual | 39.8 °F | 57.7 °F | 36.21 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |