Guttenberg, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.5 °C (low) to 14.4 °C (high). Annual precipitation averages 940.1 Millimeters. Guttenberg is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.9 °C | -2.6 °C | 32.77 mm |
| February | -9.9 °C | 0.1 °C | 31.24 mm |
| March | -3.4 °C | 7.1 °C | 49.28 mm |
| April | 2.9 °C | 14.8 °C | 91.95 mm |
| May | 9.4 °C | 21.4 °C | 114.55 mm |
| June | 15.1 °C | 26.7 °C | 146.81 mm |
| July | 17.3 °C | 28.7 °C | 122.17 mm |
| August | 16.1 °C | 27.7 °C | 92.46 mm |
| September | 11.4 °C | 23.9 °C | 94.74 mm |
| October | 4.7 °C | 16.6 °C | 70.61 mm |
| November | -1.9 °C | 7.7 °C | 52.32 mm |
| December | -7.9 °C | 0.6 °C | 41.15 mm |
| Annual | 3.5 °C | 14.4 °C | 940.05 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |