Blaine, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 17.1 °C (high). Annual precipitation averages 1075.2 Millimeters. Blaine is located in USDA Plant Hardiness Zone 7a. 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 | -5.7 °C | 3.3 °C | 86.87 mm |
| February | -4.8 °C | 4.9 °C | 69.09 mm |
| March | -0.9 °C | 10.3 °C | 89.66 mm |
| April | 4.7 °C | 17.6 °C | 91.95 mm |
| May | 10.3 °C | 22.8 °C | 107.44 mm |
| June | 15.3 °C | 27.1 °C | 112.27 mm |
| July | 17.7 °C | 28.9 °C | 99.82 mm |
| August | 16.8 °C | 28.4 °C | 90.42 mm |
| September | 13 °C | 25.3 °C | 91.69 mm |
| October | 6.6 °C | 18.6 °C | 77.98 mm |
| November | 1.1 °C | 11.6 °C | 76.2 mm |
| December | -2.7 °C | 5.8 °C | 81.79 mm |
| Annual | 6 °C | 17.1 °C | 1075.18 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |