Auburn, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.9 °C (low) to 14.5 °C (high). Annual precipitation averages 844.6 Millimeters. Auburn 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 | -2.6 °C | 19.05 mm |
| February | -10.2 °C | 0.1 °C | 25.91 mm |
| March | -3.8 °C | 7.6 °C | 48.51 mm |
| April | 2.2 °C | 15.3 °C | 90.17 mm |
| May | 9.2 °C | 21.4 °C | 120.14 mm |
| June | 15.2 °C | 27 °C | 131.57 mm |
| July | 17.3 °C | 28.7 °C | 96.52 mm |
| August | 15.8 °C | 27.4 °C | 105.92 mm |
| September | 10.6 °C | 24.2 °C | 75.18 mm |
| October | 3.8 °C | 16.9 °C | 63.25 mm |
| November | -3.3 °C | 7.8 °C | 37.34 mm |
| December | -9.1 °C | 0.3 °C | 30.99 mm |
| Annual | 2.9 °C | 14.5 °C | 844.55 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 |