Troy, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.9 °F (low) to 62.3 °F (high). Annual precipitation averages 41.1 Inches. Troy is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.3 °F | 35.9 °F | 3.0 in. |
| February | 22.5 °F | 39.5 °F | 2.3 in. |
| March | 30.8 °F | 49.9 °F | 3.2 in. |
| April | 41.3 °F | 62.9 °F | 4.12 in. |
| May | 52.5 °F | 73.2 °F | 4.57 in. |
| June | 61.5 °F | 81.6 °F | 4.42 in. |
| July | 64.5 °F | 84.8 °F | 4.33 in. |
| August | 62.6 °F | 83.7 °F | 3.11 in. |
| September | 55.2 °F | 78.1 °F | 3.15 in. |
| October | 43.8 °F | 65.7 °F | 2.81 in. |
| November | 33.6 °F | 51.8 °F | 3.08 in. |
| December | 25.8 °F | 40.4 °F | 3.04 in. |
| Annual | 42.9 °F | 62.3 °F | 41.13 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |