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October Weather in Sioux Falls, United States

Last updated: June 24, 2025

In October, the average temperature in Sioux Falls, United States is a cool 9°C (48°F). Expect a wide range of temperatures, with a minimum of -12°C (11°F) and a maximum soaring to 29°C (85°F). This month also brings 79 mm (3.1 in) of precipitation over approximately 8 days, contributing to an average humidity level of 77%.

October Temperature in Sioux Falls

In October in Sioux Falls, the average temperature is 9°C (48°F), with maximums reaching 29°C (85°F) and minimums plummeting as low as -12°C (11°F). This weather variation suggests travelers should be prepared for both warm days and chilly nights.

October Weather in Sioux Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Sioux Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sioux Falls, October typically has an average temperature of 9°C (48°F), with highs reaching up to 29°C (85°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec202035455973757165483526
Data source: Temperature data for Sioux Falls generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Sioux Falls

In Sioux Falls in October, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

October Precipitation Trends in Sioux Falls

The chart displays monthly precipitation patterns in Sioux Falls, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Sioux Falls, October typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec22246582128857794107792539
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Sioux Falls

In Sioux Falls in October, humidity is 77%. With an average temperature of 9°C (48°F), this humidity feels like a damp embrace, making traveling a bit more challenging as the cool air combines with the moisture, often leaving you with a chill that seeps into your bones.

October Average Humidity in Sioux Falls

This chart illustrates the average monthly humidity levels in Sioux Falls, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Sioux Falls is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%84%75%79%74%81%82%80%75%77%85%83%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Sioux Falls

In Sioux Falls 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 Falls.

Maximum UV Index Levels in Sioux Falls for October

The chart shows the monthly maximum UV Index (UVI) for Sioux Falls in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Sioux Falls typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec25589111098532
Data source: Sioux Falls October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How October Weather in Sioux Falls Compares to Other Months

Weather in Sioux Falls varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Sioux Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sioux Falls, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)21 mm (0.8 inches)80%low
February Weather-7°C (20°F)24 mm (0.9 inches)84%moderate
March Weather2°C (35°F)65 mm (2.6 inches)75%moderate
April Weather7°C (45°F)82 mm (3.2 inches)79%very high
May Weather15°C (59°F)128 mm (5.0 inches)74%very high
June Weather23°C (73°F)85 mm (3.3 inches)81%extreme
July Weather24°C (75°F)77 mm (3.0 inches)82%very high
August Weather22°C (72°F)94 mm (3.7 inches)80%very high
September Weather18°C (65°F)107 mm (4.2 inches)75%very high
October Weather9°C (48°F)79 mm (3.1 inches)77%moderate
November Weather1°C (35°F)25 mm (1.0 inches)85%moderate
December Weather-3°C (26°F)39 mm (1.5 inches)83%low

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