Yetter, 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 14.4 °C (high). Annual precipitation averages 843.3 Millimeters. Yetter 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 | -12.6 °C | -2.8 °C | 19.05 mm |
| February | -10.3 °C | -0.2 °C | 25.65 mm |
| March | -3.9 °C | 7.4 °C | 48.51 mm |
| April | 2.2 °C | 15.2 °C | 90.17 mm |
| May | 9.2 °C | 21.3 °C | 119.89 mm |
| June | 15.2 °C | 26.9 °C | 131.83 mm |
| July | 17.3 °C | 28.6 °C | 95.5 mm |
| August | 15.8 °C | 27.3 °C | 106.17 mm |
| September | 10.7 °C | 24.1 °C | 75.18 mm |
| October | 3.8 °C | 16.8 °C | 62.74 mm |
| November | -3.3 °C | 7.7 °C | 37.59 mm |
| December | -9.2 °C | 0.2 °C | 30.99 mm |
| Annual | 2.9 °C | 14.4 °C | 843.27 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |