Quasqueton, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 14.3 °C (high). Annual precipitation averages 963.9 Millimeters. Quasqueton 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 | -12.4 °C | -2.9 °C | 28.96 mm |
| February | -10.3 °C | -0.4 °C | 31.5 mm |
| March | -3.8 °C | 6.9 °C | 51.56 mm |
| April | 2.4 °C | 15 °C | 95.25 mm |
| May | 8.9 °C | 21.4 °C | 118.36 mm |
| June | 14.7 °C | 26.7 °C | 150.11 mm |
| July | 16.6 °C | 28.4 °C | 115.82 mm |
| August | 15.2 °C | 27.4 °C | 110.49 mm |
| September | 10.4 °C | 24 °C | 94.49 mm |
| October | 3.8 °C | 16.7 °C | 73.41 mm |
| November | -2.8 °C | 7.6 °C | 54.1 mm |
| December | -8.8 °C | 0.3 °C | 39.88 mm |
| Annual | 2.8 °C | 14.3 °C | 963.93 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 |