Mount Orab, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.3 °C (low) to 17.6 °C (high). Annual precipitation averages 1169.7 Millimeters. Mount Orab is located in USDA Plant Hardiness Zone 6b. 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 | -5.5 °C | 3.9 °C | 81.53 mm |
| February | -4.2 °C | 6.2 °C | 77.22 mm |
| March | -0.1 °C | 11.4 °C | 109.22 mm |
| April | 5.3 °C | 18.1 °C | 119.13 mm |
| May | 11.3 °C | 23 °C | 123.19 mm |
| June | 16.2 °C | 27.7 °C | 119.38 mm |
| July | 17.8 °C | 29.3 °C | 118.36 mm |
| August | 16.7 °C | 28.8 °C | 94.74 mm |
| September | 12.8 °C | 25.8 °C | 79.5 mm |
| October | 6.6 °C | 19.2 °C | 75.69 mm |
| November | 1.2 °C | 12 °C | 82.04 mm |
| December | -2.7 °C | 6.1 °C | 89.66 mm |
| Annual | 6.3 °C | 17.6 °C | 1169.66 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |