Pompey, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.5 °F (low) to 54.6 °F (high). Annual precipitation averages 44.7 Inches. Pompey is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.1 °F | 29.0 °F | 2.97 in. |
| February | 13.4 °F | 31.3 °F | 2.54 in. |
| March | 20.9 °F | 39.2 °F | 3.3 in. |
| April | 32.6 °F | 53.0 °F | 3.72 in. |
| May | 43.6 °F | 65.7 °F | 3.77 in. |
| June | 53.0 °F | 73.8 °F | 4.61 in. |
| July | 57.3 °F | 78.3 °F | 4.34 in. |
| August | 55.8 °F | 76.9 °F | 4.13 in. |
| September | 48.8 °F | 70.5 °F | 4.1 in. |
| October | 38.8 °F | 57.8 °F | 4.38 in. |
| November | 29.3 °F | 45.4 °F | 3.47 in. |
| December | 19.8 °F | 34.4 °F | 3.4 in. |
| Annual | 35.5 °F | 54.6 °F | 44.73 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |