Luana, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.3 °C (low) to 13.4 °C (high). Annual precipitation averages 976.1 Millimeters. Luana is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.3 °C | -3.8 °C | 28.45 mm |
| February | -11.4 °C | -1.3 °C | 29.97 mm |
| March | -4.7 °C | 5.9 °C | 54.61 mm |
| April | 1.7 °C | 13.9 °C | 103.63 mm |
| May | 8.3 °C | 20.6 °C | 124.46 mm |
| June | 14.4 °C | 26 °C | 149.1 mm |
| July | 16.2 °C | 27.8 °C | 117.09 mm |
| August | 14.8 °C | 26.8 °C | 107.44 mm |
| September | 10.2 °C | 23 °C | 99.06 mm |
| October | 3.4 °C | 15.8 °C | 73.41 mm |
| November | -3.2 °C | 6.8 °C | 51.05 mm |
| December | -9.4 °C | -0.6 °C | 37.85 mm |
| Annual | 2.3 °C | 13.4 °C | 976.12 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |