Council Bluffs, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.2 °F (low) to 61.9 °F (high). Annual precipitation averages 33.1 Inches. Council Bluffs is located in USDA Plant Hardiness Zone 5b. 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 | 13.3 °F | 32.4 °F | 0.82 in. |
| February | 17.1 °F | 37.3 °F | 1.0 in. |
| March | 28.0 °F | 50.5 °F | 1.8 in. |
| April | 39.0 °F | 63.2 °F | 3.38 in. |
| May | 51.4 °F | 73.3 °F | 5.04 in. |
| June | 62.0 °F | 83.3 °F | 4.77 in. |
| July | 66.3 °F | 86.8 °F | 3.57 in. |
| August | 63.5 °F | 84.9 °F | 4.1 in. |
| September | 53.9 °F | 78.5 °F | 3.17 in. |
| October | 41.1 °F | 65.5 °F | 2.64 in. |
| November | 28.5 °F | 49.7 °F | 1.48 in. |
| December | 18.4 °F | 36.9 °F | 1.37 in. |
| Annual | 40.2 °F | 61.9 °F | 33.14 in. |
| 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 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 |