Taylorville, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.5 °C (high). Annual precipitation averages 1028.7 Millimeters. Taylorville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7 °C | 1.9 °C | 55.37 mm |
| February | -5.2 °C | 4.8 °C | 52.07 mm |
| March | -0.1 °C | 11 °C | 71.63 mm |
| April | 5.8 °C | 18.2 °C | 109.47 mm |
| May | 12.1 °C | 23.8 °C | 118.62 mm |
| June | 17 °C | 28.6 °C | 117.6 mm |
| July | 18.7 °C | 30.2 °C | 99.82 mm |
| August | 17.4 °C | 29.4 °C | 90.68 mm |
| September | 12.9 °C | 26.7 °C | 83.57 mm |
| October | 6.6 °C | 19.7 °C | 86.36 mm |
| November | 0.7 °C | 11.3 °C | 83.06 mm |
| December | -4.1 °C | 4.7 °C | 60.45 mm |
| Annual | 6.2 °C | 17.5 °C | 1028.7 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |