Troy, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 58 °F (high). Annual precipitation averages 37 Inches. Troy 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 | 14.7 °F | 32.8 °F | 2.51 in. |
| February | 15.4 °F | 35.4 °F | 1.87 in. |
| March | 22.6 °F | 43.9 °F | 2.98 in. |
| April | 32.8 °F | 57.3 °F | 3.27 in. |
| May | 43.9 °F | 69.1 °F | 3.47 in. |
| June | 53.1 °F | 77.1 °F | 3.81 in. |
| July | 57.3 °F | 81.5 °F | 3.17 in. |
| August | 56.0 °F | 80.0 °F | 3.32 in. |
| September | 48.9 °F | 73.1 °F | 3.92 in. |
| October | 38.1 °F | 60.5 °F | 3.36 in. |
| November | 29.1 °F | 48.1 °F | 2.66 in. |
| December | 21.6 °F | 37.6 °F | 2.65 in. |
| Annual | 36.1 °F | 58 °F | 36.99 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 |