Estherville, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.2 °C (low) to 13.1 °C (high). Annual precipitation averages 790.2 Millimeters. Estherville 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 | -13.8 °C | -4.4 °C | 21.34 mm |
| February | -11.7 °C | -2.1 °C | 20.57 mm |
| March | -5 °C | 4.9 °C | 42.16 mm |
| April | 1.7 °C | 13.8 °C | 84.58 mm |
| May | 8.7 °C | 20.6 °C | 115.57 mm |
| June | 14.8 °C | 26.2 °C | 123.7 mm |
| July | 16.8 °C | 28.1 °C | 94.23 mm |
| August | 15.2 °C | 26.6 °C | 92.46 mm |
| September | 10.4 °C | 23.4 °C | 79.5 mm |
| October | 3.2 °C | 15.7 °C | 61.47 mm |
| November | -4 °C | 6.4 °C | 30.73 mm |
| December | -10.4 °C | -1.5 °C | 23.88 mm |
| Annual | 2.2 °C | 13.1 °C | 790.19 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 |