Marquette, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 14.3 °C (high). Annual precipitation averages 953 Millimeters. Marquette 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.2 °C | -2.5 °C | 30.99 mm |
| February | -10.2 °C | 0.1 °C | 31.24 mm |
| March | -3.9 °C | 7.1 °C | 50.8 mm |
| April | 2.3 °C | 14.8 °C | 100.84 mm |
| May | 8.7 °C | 21.3 °C | 119.63 mm |
| June | 14.4 °C | 26.6 °C | 146.81 mm |
| July | 16.7 °C | 28.6 °C | 106.43 mm |
| August | 15.6 °C | 27.6 °C | 104.14 mm |
| September | 10.8 °C | 23.7 °C | 99.82 mm |
| October | 4.1 °C | 16.5 °C | 70.36 mm |
| November | -2.5 °C | 7.7 °C | 52.58 mm |
| December | -8.3 °C | 0.6 °C | 39.37 mm |
| Annual | 3 °C | 14.3 °C | 953.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |