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Big Sioux River

Big Sioux River Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Big Sioux River, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Water Temperature in Big Sioux River

66°F

TODAY

65°F

YESTERDAY

58°F

A WEEK AGO

As of today, the minimum water temperature in the Big Sioux River ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Analysis, Historical Data, and Forecast of Water Temperature

Water Temperature Chart for Big Sioux River Over the Last 30 Days

Today the water temperature in Big Sioux River is higher than the same day in previous years. The water temperature range here in May is from 46°F to 70°F. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

The forecasted water temperature values for Big Sioux River are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Daily Water Temperature Chart

DateCurrentAverageForecast
May 2158°F56°F
May 2260°F56°F
May 2360°F56°F
May 2460°F56°F
May 2561°F56°F
May 2661°F56°F
May 2765°F56°F
May 2866°F56°F
May 2956°F66°F
May 3056°F65°F
May 3156°F65°F
Jun 165°F65°F
Jun 265°F65°F
Jun 365°F65°F
Jun 465°F65°F
Jun 565°F65°F
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in Big Sioux River by Month

January

MinimumAverageMaximum
32°F40°F48°F

February

MinimumAverageMaximum
32°F40°F48°F

March

MinimumAverageMaximum
32°F42°F52°F

April

MinimumAverageMaximum
39°F50°F61°F

May

MinimumAverageMaximum
46°F56°F70°F

June

MinimumAverageMaximum
57°F65°F72°F

July

MinimumAverageMaximum
63°F68°F75°F

August

MinimumAverageMaximum
63°F71°F73°F

September

MinimumAverageMaximum
52°F64°F66°F

October

MinimumAverageMaximum
46°F56°F61°F

November

MinimumAverageMaximum
37°F47°F61°F

December

MinimumAverageMaximum
37°F40°F46°F

Monthly Water Temperature Histogram for Big Sioux River

Water Temperature in Cities and Towns on Big Sioux River

Dell Rapids
United States (South Dakota)
65°F
Baltic
United States (South Dakota)
65°F
Flandreau
United States (South Dakota)
65°F
Watertown
United States (South Dakota)
58°F
United States (South Dakota)
66°F

Big Sioux River Weather

MAY 29

48°F / 68°F
moderate drizzle

rain: 26% | wind: 7 mph

MAY 30

50°F / 75°F
moderate drizzle

rain: 14% | wind: 8 mph

MAY 31

55°F / 79°F
overcast

rain: 5% | wind: 7 mph

JUNE 1

63°F / 81°F
overcast

rain: 5% | wind: 13 mph

Water Temperature in Big Sioux River: General Trends and Swimming Opportunities

Source Coteau des Prairies
• location Roberts County, South Dakota
Mouth Missouri River
• location Sioux City, Iowa
• coordinates 42.490805°N 96.445490°W
Length 419 mi (674 km)

The Big Sioux River, flowing through South Dakota, Minnesota, and Iowa, is a tributary of the Missouri River that plays a significant role in the region's geography and recreation. Water temperatures in the river fluctuate seasonally, with summer temperatures typically reaching the 70s Fahrenheit (21-26°C) due to warmer air and increased sunlight. In winter, the water temperature drops significantly, often approaching freezing levels, as the river is affected by the harsh Midwest climate.

Swimming in the Big Sioux River is not widely popular, primarily because of the water's quality and flow characteristics. In many areas, the river is shallow, with a silty bottom, and sections may experience periodic issues with pollution from agricultural runoff and urban areas. These factors can impact the safety and appeal of swimming. That said, certain stretches of the river are popular for kayaking, canoeing, and fishing, offering opportunities for outdoor enthusiasts to enjoy the water in other ways.

For those seeking a place to swim, nearby lakes, reservoirs, or designated public swimming spots in the region are often more suitable options. However, the Big Sioux River remains a valuable natural resource, offering scenic views and recreational possibilities beyond traditional swimming activities.

Geographical Location of Big Sioux River

Frequently Asked Questions About Big Sioux River and its Water Temperatures

What is the current water temperature in Big Sioux River?

The water temperature today in Big Sioux River ranges from 58°F (14.7°C) to 66°F (19.0°C).

What is the water temperature in Big Sioux River during the summer months?

The average water temperature in Big Sioux River during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in Big Sioux River in May?

The average water temperature in Big Sioux River in May ranges from 46°F to 70°F (8°C to 21°C).

What is the water temperature in Big Sioux River in September?

The average water temperature in Big Sioux River in September is typically between 52°F to 66°F (11°C to 19°C).

Where does Big Sioux River flow?

Big Sioux River flows through United States (South Dakota, Minnesota, Iowa).

Is it possible to swim in the Big Sioux River?

Yes, it is possible to swim in the Big Sioux River. However, water quality can vary, and it's important to check local advisories for safety.

What major cities are located on Big Sioux River?

Cities along the course of Big Sioux River include Sioux Falls (South Dakota).