Bettendorf, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.5 °F (low) to 60.4 °F (high). Annual precipitation averages 38 Inches. Bettendorf is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.8 °F | 30.7 °F | 1.52 in. |
| February | 18.4 °F | 35.2 °F | 1.76 in. |
| March | 29.1 °F | 48.1 °F | 2.55 in. |
| April | 40.3 °F | 61.4 °F | 3.66 in. |
| May | 52.1 °F | 72.6 °F | 4.84 in. |
| June | 62.1 °F | 81.9 °F | 4.83 in. |
| July | 65.8 °F | 85.0 °F | 4.27 in. |
| August | 63.6 °F | 83.1 °F | 4.0 in. |
| September | 55.4 °F | 77.1 °F | 3.42 in. |
| October | 43.5 °F | 64.3 °F | 2.88 in. |
| November | 31.4 °F | 49.2 °F | 2.27 in. |
| December | 20.9 °F | 36.1 °F | 2.0 in. |
| Annual | 41.5 °F | 60.4 °F | 38 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |