Sioux Rapids, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.2 °F (low) to 57.3 °F (high). Annual precipitation averages 31.8 Inches. Sioux Rapids is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.9 °F | 26.2 °F | 0.71 in. |
| February | 12.0 °F | 30.5 °F | 0.84 in. |
| March | 23.9 °F | 43.8 °F | 1.71 in. |
| April | 35.2 °F | 58.6 °F | 3.5 in. |
| May | 47.7 °F | 70.2 °F | 4.28 in. |
| June | 58.6 °F | 80.3 °F | 5.06 in. |
| July | 62.2 °F | 83.4 °F | 3.38 in. |
| August | 59.4 °F | 80.9 °F | 4.26 in. |
| September | 50.5 °F | 75.3 °F | 3.22 in. |
| October | 37.7 °F | 61.9 °F | 2.44 in. |
| November | 24.8 °F | 45.3 °F | 1.46 in. |
| December | 14.0 °F | 31.4 °F | 0.97 in. |
| Annual | 36.2 °F | 57.3 °F | 31.83 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |