Temperature in South Dakota in September

Daytime highs, nighttime lows and the warmest cities in South Dakota, the United States of America this September.

South Dakota, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in September ranging from 21°C (70°F) in Lead to 26°C (79°F) in Hot Springs. Nighttime temperatures generally drop to 8°C (46°F) in Hot Springs and 8°C (46°F) in Lead.

What is the temperature of the different cities in South Dakota, the United States of America in September?

Explore the map below to discover average September temperatures at the top destinations in South Dakota. For a deeper dive, simply click on any destination dot.

Select a Month

Check the conditions for any month of the year.

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For a detailed overview over the year and the best time to visit South Dakota, check out our South Dakota's climate page.

See also: South Dakota weather by month.

Best Places to Visit in South Dakota in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across South Dakota.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in South Dakota

South Dakota temperatures in September: frequently asked questions

How hot does it get in South Dakota, the United States of America in September?

Expect daytime temperatures around 24°C (75°F) in Sioux Falls. That makes September a high month for South Dakota, the United States of America.

How cold does it get at night in South Dakota, the United States of America in September?

Sioux Falls sees nighttime lows close to 10°C (50°F) in September.

What is the warmest city in September in South Dakota, the United States of America?

Hot Springs tops the warmest city list in our database with average maximum daytime temperatures around 26°C (79°F) and a minimum nighttime temperature of around 8°C (46°F).

What is the coldest city in September in South Dakota, the United States of America?

According to our data, Lead holds the title for the coldest city in South Dakota, the United States of America in September. It experiences maximum temperatures of approximately 21°C (70°F) and drops to lows of about 8°C (46°F) during the night.

Interested in more climate information?

We have much more information about the climate in South Dakota.

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