Last updated: June 24, 2025
In October, the average temperature in Sioux City, United States is a comfortable 10°C (51°F). However, be prepared for a range, as temperatures can dip to a chilly -9°C (17°F) or soar to a warm 31°C (89°F). Expect around 77 mm (3.0 in) of precipitation spread across 9 days, and don't forget, the air tends to feel quite humid, with an average humidity level of 77%.
In October in Sioux City, the average temperature is 10°C (51°F). The maximum can reach 31°C (89°F), while the minimum can be as low as -9°C (17°F). Be prepared for a wide range of temperatures when traveling during this time.
In Sioux City in October, the precipitation amount is 77 mm (3.0 in) over the course of 9 days.
In Sioux City in October humidity is 77%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that can make outdoor activities somewhat uncomfortable, causing clothes to cling to your skin and breathing to feel heavier, which may deter longer sightseeing adventures.
In Sioux City in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Sioux City.
UV Risk Categories
Weather in Sioux City varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in 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 |