Luxemburg, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.5 °C (low) to 13.1 °C (high). Annual precipitation averages 985 Millimeters. Luxemburg is located in USDA Plant Hardiness Zone 5a. 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 | -12.7 °C | -3.8 °C | 32 mm |
| February | -10.7 °C | -1.3 °C | 33.78 mm |
| March | -4.3 °C | 5.9 °C | 52.58 mm |
| April | 1.9 °C | 13.7 °C | 99.06 mm |
| May | 8.5 °C | 20.1 °C | 118.62 mm |
| June | 14.2 °C | 25.3 °C | 149.61 mm |
| July | 16.1 °C | 27.1 °C | 122.94 mm |
| August | 14.9 °C | 26.1 °C | 104.9 mm |
| September | 10.2 °C | 22.5 °C | 98.3 mm |
| October | 3.5 °C | 15.3 °C | 75.18 mm |
| November | -3 °C | 6.6 °C | 55.88 mm |
| December | -9 °C | -0.5 °C | 42.16 mm |
| Annual | 2.5 °C | 13.1 °C | 985.01 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |