Spencer, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.7 °F (low) to 57.7 °F (high). Annual precipitation averages 39.8 Inches. Spencer 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 | 14.2 °F | 32.1 °F | 2.47 in. |
| February | 14.7 °F | 34.5 °F | 2.13 in. |
| March | 22.0 °F | 42.5 °F | 3.14 in. |
| April | 32.4 °F | 56.5 °F | 3.5 in. |
| May | 43.4 °F | 69.0 °F | 3.26 in. |
| June | 52.7 °F | 77.1 °F | 4.22 in. |
| July | 56.9 °F | 81.4 °F | 3.96 in. |
| August | 55.6 °F | 80.3 °F | 3.73 in. |
| September | 48.6 °F | 73.1 °F | 4.05 in. |
| October | 37.8 °F | 60.5 °F | 3.64 in. |
| November | 28.8 °F | 47.8 °F | 2.79 in. |
| December | 21.1 °F | 37.0 °F | 2.86 in. |
| Annual | 35.7 °F | 57.7 °F | 39.75 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |