Emmetsburg, 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 13.7 °C (high). Annual precipitation averages 861.6 Millimeters. Emmetsburg 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 | -13.4 °C | -3.9 °C | 19.81 mm |
| February | -11.2 °C | -1.6 °C | 23.62 mm |
| March | -4.6 °C | 5.7 °C | 46.74 mm |
| April | 2.1 °C | 14.4 °C | 92.46 mm |
| May | 8.9 °C | 20.9 °C | 116.84 mm |
| June | 15.1 °C | 26.8 °C | 144.02 mm |
| July | 16.9 °C | 28.6 °C | 99.82 mm |
| August | 15.4 °C | 27.1 °C | 109.47 mm |
| September | 10.6 °C | 23.9 °C | 85.85 mm |
| October | 3.6 °C | 16.4 °C | 57.66 mm |
| November | -3.7 °C | 6.8 °C | 37.34 mm |
| December | -9.8 °C | -0.9 °C | 27.94 mm |
| Annual | 2.5 °C | 13.7 °C | 861.57 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 |