Macedonia, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.5 °C (low) to 18.8 °C (high). Annual precipitation averages 1175 Millimeters. Macedonia 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 | -4.9 °C | 4.4 °C | 86.36 mm |
| February | -3.3 °C | 7.2 °C | 72.9 mm |
| March | 1.6 °C | 12.8 °C | 103.89 mm |
| April | 7.2 °C | 19.3 °C | 129.54 mm |
| May | 13 °C | 24.3 °C | 131.83 mm |
| June | 17.7 °C | 29.1 °C | 117.6 mm |
| July | 19.7 °C | 30.8 °C | 99.82 mm |
| August | 18.5 °C | 30.4 °C | 76.71 mm |
| September | 13.9 °C | 27.1 °C | 79.5 mm |
| October | 7.4 °C | 20.6 °C | 86.36 mm |
| November | 1.8 °C | 13 °C | 104.65 mm |
| December | -2.7 °C | 6.8 °C | 85.85 mm |
| Annual | 7.5 °C | 18.8 °C | 1175.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |