Last updated: June 24, 2025
In August, the average temperature in North Sioux City, United States hovers around 23°C (73°F), making for a comfortable climate. However, be prepared for some variability, as temperatures can dip to a chilly 9°C (49°F) at night and rise to a scorching 36°C (97°F) during the day. With an average precipitation of 109 mm (4.3 in) over 9 days, you might want to carry an umbrella. Additionally, the air tends to be quite humid, with an average humidity level of 80%.
In August in North Sioux City, the average temperature is 23°C (73°F). Maximum temperatures can reach 36°C (97°F), while the minimum can drop as low as 9°C (49°F). Pack for a range of weather to fully enjoy your travels in North Sioux City this month.
In North Sioux City in August, the total precipitation amount is 109 mm (4.3 in) spread over 9 days.
In North Sioux City in August humidity is 80%. With an average temperature of 23°C (73°F), this humidity feels like a warm blanket enveloping you, making outdoor activities slightly sticky and requiring frequent breaks in shaded areas to stay comfortable while exploring.
In North Sioux City in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in North Sioux City.
UV Risk Categories
Weather in North Sioux City varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in North Sioux City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 28 mm (1.1 inches) | 80% | moderate |
| February Weather | -5°C (23°F) | 29 mm (1.2 inches) | 84% | moderate |
| March Weather | 3°C (38°F) | 81 mm (3.2 inches) | 75% | moderate |
| April Weather | 9°C (48°F) | 80 mm (3.2 inches) | 79% | very high |
| May Weather | 16°C (61°F) | 140 mm (5.5 inches) | 74% | very high |
| June Weather | 23°C (74°F) | 102 mm (4.0 inches) | 81% | extreme |
| July Weather | 25°C (77°F) | 66 mm (2.6 inches) | 82% | very high |
| August Weather | 23°C (73°F) | 109 mm (4.3 inches) | 80% | very high |
| September Weather | 20°C (68°F) | 101 mm (4.0 inches) | 75% | very high |
| October Weather | 10°C (51°F) | 77 mm (3.0 inches) | 77% | moderate |
| November Weather | 3°C (38°F) | 27 mm (1.0 inches) | 85% | moderate |
| December Weather | -2°C (29°F) | 41 mm (1.6 inches) | 83% | low |