Campbell, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.5 °C (low) to 14.7 °C (high). Annual precipitation averages 891.3 Millimeters. Campbell is located in USDA Plant Hardiness Zone 6a. 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 | -9.5 °C | 0.4 °C | 52.58 mm |
| February | -8.9 °C | 1.9 °C | 45.72 mm |
| March | -5.1 °C | 6.6 °C | 64.01 mm |
| April | 0.6 °C | 14.2 °C | 75.69 mm |
| May | 6.7 °C | 21 °C | 78.49 mm |
| June | 11.8 °C | 25.5 °C | 93.73 mm |
| July | 14.2 °C | 27.9 °C | 90.17 mm |
| August | 13.4 °C | 27 °C | 88.14 mm |
| September | 9.6 °C | 23.1 °C | 93.47 mm |
| October | 3.7 °C | 16.2 °C | 85.85 mm |
| November | -1.4 °C | 9.1 °C | 64.52 mm |
| December | -5.7 °C | 3.1 °C | 58.93 mm |
| Annual | 2.5 °C | 14.7 °C | 891.3 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |