North Sioux City, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.4 °F (low) to 59.7 °F (high). Annual precipitation averages 28.7 Inches. North Sioux City 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 | 9.6 °F | 29.0 °F | 0.61 in. |
| February | 13.9 °F | 34.2 °F | 0.75 in. |
| March | 25.1 °F | 47.2 °F | 1.54 in. |
| April | 36.2 °F | 60.9 °F | 3.12 in. |
| May | 48.8 °F | 72.1 °F | 4.0 in. |
| June | 59.8 °F | 82.3 °F | 4.49 in. |
| July | 63.4 °F | 85.5 °F | 3.25 in. |
| August | 60.9 °F | 83.4 °F | 3.39 in. |
| September | 51.4 °F | 77.1 °F | 2.98 in. |
| October | 38.5 °F | 63.9 °F | 2.38 in. |
| November | 25.5 °F | 47.4 °F | 1.27 in. |
| December | 15.1 °F | 33.8 °F | 0.93 in. |
| Annual | 37.4 °F | 59.7 °F | 28.71 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |