Troupsburg, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.4 °C (low) to 13.1 °C (high). Annual precipitation averages 939.5 Millimeters. Troupsburg is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | -0.7 °C | 59.44 mm |
| February | -9 °C | 0.3 °C | 44.7 mm |
| March | -5.2 °C | 5 °C | 66.29 mm |
| April | 0.8 °C | 12.3 °C | 77.47 mm |
| May | 7.2 °C | 19.2 °C | 86.61 mm |
| June | 11.7 °C | 23.6 °C | 103.89 mm |
| July | 13.9 °C | 26 °C | 92.96 mm |
| August | 13.1 °C | 25.3 °C | 90.93 mm |
| September | 8.9 °C | 21.8 °C | 94.74 mm |
| October | 3.5 °C | 14.7 °C | 91.95 mm |
| November | -1.1 °C | 7.6 °C | 69.34 mm |
| December | -5.9 °C | 1.5 °C | 61.21 mm |
| Annual | 2.4 °C | 13.1 °C | 939.53 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |