North Liberty, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.1 °C (low) to 15.3 °C (high). Annual precipitation averages 961.4 Millimeters. North Liberty 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 | -10.8 °C | -1.4 °C | 31.24 mm |
| February | -8.7 °C | 1.1 °C | 37.34 mm |
| March | -2.6 °C | 8.3 °C | 57.15 mm |
| April | 3.6 °C | 16.2 °C | 96.27 mm |
| May | 10.2 °C | 22.1 °C | 118.62 mm |
| June | 15.8 °C | 27.2 °C | 135.89 mm |
| July | 17.7 °C | 29.1 °C | 112.78 mm |
| August | 16.3 °C | 28.1 °C | 107.95 mm |
| September | 11.6 °C | 24.7 °C | 90.42 mm |
| October | 4.8 °C | 17.4 °C | 74.93 mm |
| November | -1.7 °C | 8.8 °C | 56.13 mm |
| December | -7.6 °C | 1.5 °C | 42.67 mm |
| Annual | 4.1 °C | 15.3 °C | 961.39 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 |