Macksburg, 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 15.6 °C (high). Annual precipitation averages 913.4 Millimeters. Macksburg 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 | -0.7 °C | 23.37 mm |
| February | -8.5 °C | 2.2 °C | 32.26 mm |
| March | -2.7 °C | 9.2 °C | 53.09 mm |
| April | 3.4 °C | 16.3 °C | 93.47 mm |
| May | 10.1 °C | 21.8 °C | 133.35 mm |
| June | 15.7 °C | 27.1 °C | 124.46 mm |
| July | 18 °C | 29.2 °C | 106.68 mm |
| August | 16.7 °C | 28.4 °C | 101.09 mm |
| September | 11.7 °C | 24.6 °C | 93.22 mm |
| October | 4.8 °C | 17.7 °C | 68.07 mm |
| November | -1.9 °C | 9.2 °C | 49.78 mm |
| December | -7.7 °C | 2 °C | 34.54 mm |
| Annual | 4.1 °C | 15.6 °C | 913.38 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |