Sherrard, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 15.5 °C (high). Annual precipitation averages 964.7 Millimeters. Sherrard is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.1 °C | -1 °C | 40.39 mm |
| February | -8.1 °C | 1.5 °C | 46.23 mm |
| March | -2.3 °C | 8.9 °C | 60.71 mm |
| April | 3.8 °C | 16.3 °C | 95.5 mm |
| May | 10.5 °C | 22.4 °C | 123.95 mm |
| June | 16 °C | 27.2 °C | 122.68 mm |
| July | 18 °C | 28.8 °C | 102.62 mm |
| August | 16.8 °C | 27.8 °C | 98.04 mm |
| September | 12.2 °C | 24.7 °C | 91.69 mm |
| October | 5.7 °C | 17.6 °C | 73.41 mm |
| November | -1 °C | 9.2 °C | 58.67 mm |
| December | -6.7 °C | 2.1 °C | 50.8 mm |
| Annual | 4.6 °C | 15.5 °C | 964.69 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |