Burlington, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.1 °F (low) to 61.3 °F (high). Annual precipitation averages 39.3 Inches. Burlington is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.0 °F | 32.3 °F | 1.66 in. |
| February | 19.7 °F | 37.0 °F | 1.86 in. |
| March | 30.1 °F | 49.5 °F | 2.63 in. |
| April | 41.1 °F | 62.3 °F | 3.95 in. |
| May | 52.8 °F | 72.8 °F | 5.1 in. |
| June | 62.6 °F | 82.1 °F | 4.79 in. |
| July | 66.1 °F | 85.4 °F | 4.19 in. |
| August | 64.0 °F | 83.8 °F | 3.77 in. |
| September | 55.5 °F | 77.8 °F | 3.72 in. |
| October | 43.8 °F | 65.1 °F | 3.06 in. |
| November | 32.0 °F | 50.0 °F | 2.6 in. |
| December | 22.0 °F | 37.5 °F | 1.95 in. |
| Annual | 42.1 °F | 61.3 °F | 39.28 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |