Portage Des Sioux, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46.4 °F (low) to 65.5 °F (high). Annual precipitation averages 41.8 Inches. Portage Des Sioux is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.3 °F | 38.6 °F | 2.51 in. |
| February | 25.8 °F | 44.1 °F | 2.25 in. |
| March | 34.7 °F | 54.4 °F | 3.29 in. |
| April | 45.9 °F | 66.7 °F | 4.72 in. |
| May | 56.6 °F | 75.9 °F | 4.85 in. |
| June | 65.7 °F | 84.5 °F | 4.29 in. |
| July | 69.4 °F | 87.9 °F | 3.81 in. |
| August | 67.3 °F | 86.8 °F | 3.64 in. |
| September | 58.9 °F | 80.4 °F | 3.26 in. |
| October | 46.9 °F | 68.6 °F | 3.16 in. |
| November | 35.8 °F | 54.7 °F | 3.42 in. |
| December | 27.0 °F | 43.4 °F | 2.63 in. |
| Annual | 46.4 °F | 65.5 °F | 41.83 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |