Eddyville, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.8 °C (high). Annual precipitation averages 933.2 Millimeters. Eddyville is located in USDA Plant Hardiness Zone 5b. 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 | -10.3 °C | -1.1 °C | 30.99 mm |
| February | -8.6 °C | 1.4 °C | 37.34 mm |
| March | -2.3 °C | 9.6 °C | 54.36 mm |
| April | 4.6 °C | 16.6 °C | 94.23 mm |
| May | 11.1 °C | 22.5 °C | 125.22 mm |
| June | 16.9 °C | 28.1 °C | 131.32 mm |
| July | 18.4 °C | 30.2 °C | 104.9 mm |
| August | 17.6 °C | 28.8 °C | 98.55 mm |
| September | 12.3 °C | 24.6 °C | 94.49 mm |
| October | 5.4 °C | 18.2 °C | 68.07 mm |
| November | -1.1 °C | 8.8 °C | 55.12 mm |
| December | -6.9 °C | 2.3 °C | 38.61 mm |
| Annual | 4.8 °C | 15.8 °C | 933.2 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |