Halbur, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.9 °C (low) to 14.7 °C (high). Annual precipitation averages 852.9 Millimeters. Halbur 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.2 °C | -2.2 °C | 20.57 mm |
| February | -10.1 °C | 0.4 °C | 26.92 mm |
| March | -3.8 °C | 7.9 °C | 48.77 mm |
| April | 2.2 °C | 15.3 °C | 88.65 mm |
| May | 9.2 °C | 21.4 °C | 120.4 mm |
| June | 15.2 °C | 27.1 °C | 128.78 mm |
| July | 17.2 °C | 28.8 °C | 102.87 mm |
| August | 15.6 °C | 27.6 °C | 104.65 mm |
| September | 10.6 °C | 24.3 °C | 77.98 mm |
| October | 3.8 °C | 17.1 °C | 65.02 mm |
| November | -3.4 °C | 7.9 °C | 36.83 mm |
| December | -9 °C | 0.6 °C | 31.5 mm |
| Annual | 2.9 °C | 14.7 °C | 852.94 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |