Coggon, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.7 °C (low) to 14.2 °C (high). Annual precipitation averages 997.2 Millimeters. Coggon 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 | -12.3 °C | -2.8 °C | 30.99 mm |
| February | -10.3 °C | -0.3 °C | 32.26 mm |
| March | -3.9 °C | 7 °C | 52.83 mm |
| April | 2.2 °C | 14.8 °C | 98.3 mm |
| May | 8.7 °C | 21.2 °C | 115.32 mm |
| June | 14.6 °C | 26.6 °C | 153.42 mm |
| July | 16.4 °C | 28.3 °C | 114.3 mm |
| August | 15 °C | 27.3 °C | 121.67 mm |
| September | 10.2 °C | 23.7 °C | 100.08 mm |
| October | 3.7 °C | 16.4 °C | 77.22 mm |
| November | -2.9 °C | 7.7 °C | 59.44 mm |
| December | -8.7 °C | 0.4 °C | 41.4 mm |
| Annual | 2.7 °C | 14.2 °C | 997.23 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |