North Salem, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 16.3 °C (high). Annual precipitation averages 1240.5 Millimeters. North Salem 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.7 °C | 2.7 °C | 94.49 mm |
| February | -5.7 °C | 4.4 °C | 65.53 mm |
| March | -1.8 °C | 8.7 °C | 96.77 mm |
| April | 4.1 °C | 15.9 °C | 98.04 mm |
| May | 9.4 °C | 21.7 °C | 87.63 mm |
| June | 14.7 °C | 26.2 °C | 103.12 mm |
| July | 17.7 °C | 29.1 °C | 116.08 mm |
| August | 16.9 °C | 28 °C | 132.84 mm |
| September | 12.8 °C | 24.2 °C | 115.06 mm |
| October | 6.5 °C | 17.7 °C | 123.19 mm |
| November | 1.1 °C | 11.3 °C | 106.43 mm |
| December | -3.3 °C | 5.3 °C | 101.35 mm |
| Annual | 5.5 °C | 16.3 °C | 1240.53 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |