Aurora, Iowa has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.9 °F (low) to 56.4 °F (high). Annual precipitation averages 37.8 Inches. Aurora 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 | 7.8 °F | 25.4 °F | 1.11 in. |
| February | 11.7 °F | 29.7 °F | 1.17 in. |
| March | 23.8 °F | 42.9 °F | 1.97 in. |
| April | 35.1 °F | 57.5 °F | 3.79 in. |
| May | 47.2 °F | 69.5 °F | 4.75 in. |
| June | 58.3 °F | 79.2 °F | 5.86 in. |
| July | 61.1 °F | 81.9 °F | 5.08 in. |
| August | 58.5 °F | 79.8 °F | 3.96 in. |
| September | 50.2 °F | 73.9 °F | 3.68 in. |
| October | 37.6 °F | 60.9 °F | 2.91 in. |
| November | 25.4 °F | 44.4 °F | 1.99 in. |
| December | 14.5 °F | 31.1 °F | 1.54 in. |
| Annual | 35.9 °F | 56.4 °F | 37.81 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |