Sterling, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.7 °F (low) to 59.9 °F (high). Annual precipitation averages 39.8 Inches. Sterling is located in USDA Plant Hardiness Zone 6a. 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 | 18.9 °F | 34.1 °F | 2.79 in. |
| February | 20.2 °F | 37.0 °F | 2.07 in. |
| March | 28.0 °F | 46.8 °F | 2.96 in. |
| April | 38.5 °F | 60.1 °F | 3.68 in. |
| May | 49.2 °F | 70.6 °F | 4.05 in. |
| June | 58.5 °F | 79.2 °F | 4.28 in. |
| July | 62.1 °F | 82.5 °F | 3.98 in. |
| August | 60.4 °F | 81.2 °F | 3.69 in. |
| September | 53.0 °F | 75.1 °F | 3.46 in. |
| October | 42.1 °F | 63.0 °F | 3.2 in. |
| November | 32.7 °F | 50.2 °F | 2.86 in. |
| December | 24.9 °F | 39.0 °F | 2.79 in. |
| Annual | 40.7 °F | 59.9 °F | 39.81 in. |
| 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |