Blakeslee, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.2 °C (low) to 15.3 °C (high). Annual precipitation averages 951.2 Millimeters. Blakeslee 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 | -8.4 °C | -0.1 °C | 60.71 mm |
| February | -7.5 °C | 1.9 °C | 52.32 mm |
| March | -2.8 °C | 8 °C | 63.5 mm |
| April | 2.8 °C | 15.4 °C | 91.95 mm |
| May | 9.3 °C | 21.7 °C | 108.71 mm |
| June | 14.7 °C | 26.9 °C | 96.01 mm |
| July | 16.6 °C | 29 °C | 92.46 mm |
| August | 15.4 °C | 27.8 °C | 96.52 mm |
| September | 11.2 °C | 24.4 °C | 79.76 mm |
| October | 5.1 °C | 17.2 °C | 72.9 mm |
| November | -0.4 °C | 9.2 °C | 75.44 mm |
| December | -5.2 °C | 2.7 °C | 60.96 mm |
| Annual | 4.2 °C | 15.3 °C | 951.24 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |