Bluford, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 18.4 °C (high). Annual precipitation averages 1146.8 Millimeters. Bluford 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.2 °C | 3.9 °C | 78.49 mm |
| February | -3.6 °C | 6.6 °C | 69.6 mm |
| March | 1.2 °C | 12.3 °C | 96.52 mm |
| April | 6.9 °C | 18.7 °C | 123.44 mm |
| May | 12.9 °C | 23.8 °C | 126.75 mm |
| June | 17.8 °C | 28.8 °C | 120.14 mm |
| July | 19.6 °C | 30.5 °C | 101.35 mm |
| August | 18.3 °C | 30.1 °C | 85.09 mm |
| September | 13.7 °C | 26.7 °C | 82.04 mm |
| October | 7.3 °C | 20.3 °C | 86.36 mm |
| November | 1.7 °C | 12.4 °C | 99.82 mm |
| December | -2.8 °C | 6.2 °C | 77.22 mm |
| Annual | 7.3 °C | 18.4 °C | 1146.82 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 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 |