Correctionville, 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 15 °C (high). Annual precipitation averages 805.4 Millimeters. Correctionville 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 | -12.9 °C | -2.1 °C | 18.29 mm |
| February | -10.7 °C | 0.6 °C | 22.1 mm |
| March | -4.4 °C | 8.1 °C | 44.7 mm |
| April | 1.4 °C | 15.8 °C | 83.82 mm |
| May | 8.4 °C | 22.1 °C | 107.44 mm |
| June | 14.7 °C | 27.6 °C | 128.27 mm |
| July | 16.6 °C | 29.2 °C | 100.33 mm |
| August | 15.2 °C | 27.9 °C | 106.68 mm |
| September | 10 °C | 24.8 °C | 72.64 mm |
| October | 2.7 °C | 17.4 °C | 59.44 mm |
| November | -4.3 °C | 8.3 °C | 34.8 mm |
| December | -9.9 °C | 0.8 °C | 26.92 mm |
| Annual | 2.2 °C | 15 °C | 805.43 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |