Salem Heights, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.9 °F (low) to 59.5 °F (high). Annual precipitation averages 40.7 Inches. Salem Heights 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.5 °F | 33.8 °F | 2.92 in. |
| February | 19.6 °F | 36.7 °F | 2.3 in. |
| March | 27.4 °F | 46.3 °F | 3.14 in. |
| April | 38.2 °F | 59.8 °F | 4.08 in. |
| May | 48.1 °F | 70.2 °F | 3.69 in. |
| June | 57.4 °F | 78.6 °F | 4.28 in. |
| July | 60.9 °F | 82.3 °F | 4.37 in. |
| August | 59.0 °F | 81.0 °F | 3.08 in. |
| September | 52.2 °F | 74.8 °F | 3.83 in. |
| October | 41.3 °F | 62.7 °F | 3.21 in. |
| November | 32.4 °F | 49.5 °F | 2.92 in. |
| December | 24.3 °F | 38.7 °F | 2.92 in. |
| Annual | 39.9 °F | 59.5 °F | 40.74 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |