Lisbon, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 15.4 °C (high). Annual precipitation averages 966.5 Millimeters. Lisbon 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 | -9.1 °C | -0.6 °C | 46.99 mm |
| February | -7.4 °C | 1.7 °C | 43.69 mm |
| March | -2 °C | 8.4 °C | 59.69 mm |
| April | 3.8 °C | 15.7 °C | 93.47 mm |
| May | 10.1 °C | 21.8 °C | 119.13 mm |
| June | 15.6 °C | 27 °C | 118.36 mm |
| July | 17.6 °C | 28.7 °C | 101.6 mm |
| August | 16.6 °C | 27.7 °C | 98.81 mm |
| September | 12.3 °C | 24.8 °C | 85.34 mm |
| October | 5.6 °C | 17.6 °C | 81.28 mm |
| November | -0.4 °C | 9.3 °C | 63.75 mm |
| December | -5.9 °C | 2.3 °C | 54.36 mm |
| Annual | 4.7 °C | 15.4 °C | 966.47 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 |