Philo, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 17 °C (high). Annual precipitation averages 1051.6 Millimeters. Philo is located in USDA Plant Hardiness Zone 6b. 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 | -6.6 °C | 3.1 °C | 78.74 mm |
| February | -5.6 °C | 5 °C | 62.99 mm |
| March | -1.6 °C | 10.6 °C | 86.87 mm |
| April | 4.1 °C | 17.9 °C | 96.52 mm |
| May | 9.8 °C | 22.8 °C | 103.38 mm |
| June | 14.8 °C | 27.1 °C | 115.06 mm |
| July | 17.1 °C | 28.9 °C | 108.46 mm |
| August | 16.2 °C | 28.4 °C | 91.19 mm |
| September | 11.8 °C | 24.9 °C | 88.39 mm |
| October | 5.3 °C | 18.4 °C | 70.61 mm |
| November | 0 °C | 11.7 °C | 72.14 mm |
| December | -3.6 °C | 5.6 °C | 77.22 mm |
| Annual | 5.1 °C | 17 °C | 1051.57 mm |
| 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 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 |