Waukon, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 12.9 °C (high). Annual precipitation averages 973.8 Millimeters. Waukon is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.3 °C | -4.2 °C | 27.18 mm |
| February | -11.7 °C | -1.7 °C | 27.18 mm |
| March | -4.8 °C | 5.5 °C | 44.7 mm |
| April | 1.4 °C | 13.4 °C | 105.41 mm |
| May | 8.1 °C | 20.1 °C | 123.95 mm |
| June | 14.2 °C | 25.3 °C | 158.24 mm |
| July | 16.2 °C | 27.3 °C | 119.13 mm |
| August | 14.8 °C | 26.3 °C | 113.54 mm |
| September | 10.1 °C | 22.6 °C | 102.62 mm |
| October | 3.3 °C | 15.3 °C | 68.83 mm |
| November | -3.3 °C | 6.1 °C | 48.77 mm |
| December | -9.7 °C | -1.1 °C | 34.29 mm |
| Annual | 2.1 °C | 12.9 °C | 973.84 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |