Libertyville, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 16.2 °C (high). Annual precipitation averages 974.1 Millimeters. Libertyville is located in USDA Plant Hardiness Zone 5b. 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 | -9.6 °C | -0.1 °C | 36.32 mm |
| February | -7.6 °C | 2.4 °C | 43.43 mm |
| March | -1.6 °C | 9.7 °C | 58.42 mm |
| April | 4.4 °C | 17.1 °C | 95.76 mm |
| May | 11 °C | 22.7 °C | 136.14 mm |
| June | 16.5 °C | 27.9 °C | 129.03 mm |
| July | 18.5 °C | 29.9 °C | 105.66 mm |
| August | 17.2 °C | 28.9 °C | 101.09 mm |
| September | 12.2 °C | 25.3 °C | 92.71 mm |
| October | 5.8 °C | 18.2 °C | 74.42 mm |
| November | -0.7 °C | 9.7 °C | 57.91 mm |
| December | -6.2 °C | 2.8 °C | 43.18 mm |
| Annual | 5 °C | 16.2 °C | 974.07 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |