Blanford, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.4 °C (high). Annual precipitation averages 1099.8 Millimeters. Blanford is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 2 °C | 74.93 mm |
| February | -5.2 °C | 4.7 °C | 65.28 mm |
| March | 0 °C | 10.9 °C | 83.82 mm |
| April | 5.8 °C | 17.9 °C | 118.87 mm |
| May | 11.8 °C | 23.8 °C | 113.28 mm |
| June | 16.8 °C | 28.4 °C | 125.73 mm |
| July | 18.4 °C | 29.8 °C | 106.93 mm |
| August | 17.1 °C | 29.2 °C | 78.99 mm |
| September | 12.7 °C | 26.4 °C | 77.98 mm |
| October | 6.5 °C | 19.6 °C | 95.5 mm |
| November | 0.8 °C | 11.3 °C | 85.85 mm |
| December | -3.9 °C | 4.6 °C | 72.64 mm |
| Annual | 6.2 °C | 17.4 °C | 1099.8 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |