Salem, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 57.8 °F (high). Annual precipitation averages 40.8 Inches. Salem 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 | 10.8 °F | 31.0 °F | 2.86 in. |
| February | 11.8 °F | 34.4 °F | 2.18 in. |
| March | 21.3 °F | 43.0 °F | 3.1 in. |
| April | 33.4 °F | 57.4 °F | 3.08 in. |
| May | 44.0 °F | 69.3 °F | 3.56 in. |
| June | 53.2 °F | 77.0 °F | 4.38 in. |
| July | 57.5 °F | 81.8 °F | 3.9 in. |
| August | 55.9 °F | 80.4 °F | 4.13 in. |
| September | 48.1 °F | 73.5 °F | 3.67 in. |
| October | 37.3 °F | 60.7 °F | 3.84 in. |
| November | 28.4 °F | 48.1 °F | 3.0 in. |
| December | 19.4 °F | 36.5 °F | 3.05 in. |
| Annual | 35.1 °F | 57.8 °F | 40.75 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |