Keosauqua, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.3 °F (low) to 62.7 °F (high). Annual precipitation averages 37.6 Inches. Keosauqua 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 | 16.6 °F | 33.5 °F | 1.45 in. |
| February | 20.0 °F | 38.2 °F | 1.83 in. |
| March | 30.6 °F | 51.0 °F | 2.21 in. |
| April | 41.5 °F | 64.4 °F | 3.72 in. |
| May | 52.6 °F | 74.3 °F | 5.45 in. |
| June | 62.1 °F | 83.5 °F | 4.74 in. |
| July | 66.1 °F | 87.3 °F | 4.05 in. |
| August | 64.0 °F | 85.9 °F | 3.63 in. |
| September | 55.4 °F | 79.2 °F | 3.67 in. |
| October | 44.0 °F | 66.1 °F | 2.95 in. |
| November | 32.4 °F | 50.8 °F | 2.24 in. |
| December | 22.3 °F | 38.5 °F | 1.7 in. |
| Annual | 42.3 °F | 62.7 °F | 37.64 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |