Lone Tree, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 15.6 °C (high). Annual precipitation averages 951 Millimeters. Lone Tree 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 | -10.3 °C | -1.1 °C | 33.02 mm |
| February | -8.4 °C | 1.4 °C | 39.12 mm |
| March | -2.3 °C | 8.7 °C | 59.94 mm |
| April | 3.9 °C | 16.4 °C | 94.23 mm |
| May | 10.6 °C | 22.4 °C | 121.16 mm |
| June | 16.2 °C | 27.5 °C | 129.54 mm |
| July | 18 °C | 29.4 °C | 106.93 mm |
| August | 16.6 °C | 28.3 °C | 106.17 mm |
| September | 11.8 °C | 25.1 °C | 87.38 mm |
| October | 5.2 °C | 17.7 °C | 74.17 mm |
| November | -1.3 °C | 9.2 °C | 55.88 mm |
| December | -7.2 °C | 1.8 °C | 43.43 mm |
| Annual | 4.4 °C | 15.6 °C | 950.97 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 |